Possible Answers: To find the perimeter of any rectangle, add all of the sides up: 20 + 20 + 12 + 12 = 64 inches. You could use this formula as well: , where P = perimeter, l = length, w = width. This formula comes from the fact that there are 2 lengths and 2 widths in every rectangle. Perimeter of a polygon is the total length of its boundary. Formula for the area of a polygon is different for different polygons. Examples: Area of a square = ( S i d e) 2 Area of a rectangle = length × width. We can give the generalized formula to find the perimeter of a polygon as: Perimeter of a polygon = Sum of all sides.Easily calculate the perimeter of a quadrilateral using our calculator and formula. Enter the values of the four sides to get an instant answer. Learn more now!To calculate the perimeter of a triangle, we have to calculate the total length across the boundaries of the triangle. Since the perimeter is calculated by doing addition, this makes the perimeter a linear measure. Therefore, the units of the perimeter are the same as the unit of the given sides, i.e., centimeters, meters, inches, etc.The perimeter is the total length or distance around a two dimensional shape. In the figure below, the perimeter of each shape is the sum of the lengths of each side, shown in red. The perimeter of a circle or ellipse is called the circumference. For a polygon, the perimeter is the sum of its side lengths. The perimeter of the quadrilateral ... The perimeter is the distance all around the outside of a shape. We can find the perimeter of a sector using what we know about finding the length of an arc. A sector is formed between two radii ...6. Add up the lengths of the three side lengths to find the perimeter. Recall that the perimeter P = a + b + c. Now that you know the lengths of sides a, b and c, you simply need to add the lengths together to find the perimeter. In our first example, P = 3 + 4 + 5, or 12. In our second example, P = 6 + 8 + 10, or 24 .The easiest way to calculate the number of acres in your land is to use the calculator above. If you know the length and width, simply enter them. The calculator will provide the number of acres, as well as the area in other units. To calculate acres by hand, multiply your length and width (in feet) to get square feet.To find the perimeter of a trapezoid if you know the length of both sides and the bases, add together the length of all 4 sides. If you know the height, both side lengths, and the top base length, draw a straight line down from each top corner to form a square and 2 triangles. Then, use the Pythagorean Theorem to find the length of the base of ...24m. Correct answer: 12 2–√ m + 12m. Explanation: The formula for the perimeter of a kite is: P = 2(slong) + 2(sshort) Where slong is the length of the longer side and sshort is the length of the shorter side. Use the formulas for a 45 − 45 − 90 triangle and a 30 − 60 − 90 triangle to find the lengths of the longer sides.06-Apr-2017 ... For lesson plans and activities that go along with this video, visit https://rb.gy/feozdh. This outer space-themed video teaches the ...Explanation: . We know that .. We also know that since is a square, all of its sides are of equal length. To get the measure of any one side of , take the square root of the area: centimeters. Therefore each side of is 14 centimeters long. …Example 1: calculate the perimeter of a sector (quadrant) Calculate the perimeter of a sector of the sector. Give your answer to 3 3 decimal places. Find the length of the diameter/radius. Radius = 6cm = 6cm. 2 Find the size of the angle creating the arc of the sector. Angle = 90^o = 90o.Example 1: Calculate the perimeter of a parallelogram if the length of its sides are 7 cm and 8 cm. Solution: The details in the question are, a = 7 cm and b = 8 cm. We know that, the perimeter of a parallelogram is 2 (a + b) = 2 (7 + 8 ) [Substitute the values in the formula] = 2 (15) = 30.Perimeter: The perimeter of a shape is the distance around that shape. This distance may consist of straight lines or curves. We can find the perimeter by ...4 years ago. perimeter of a circle is called Circumference. To find circumference of a circle, multiply diameter by Pi value (3.14..): Circumference = Pi * Diameter. or if you know the radius, the formula will be be: Circumference = Pi * Radius * 2. Because diameter = 2 * radius. To find Area of a circle, multiply Pi by squared radius. 01-Oct-2011 ... Area is the amount of space inside a shape. For example, if you want to put new tiles on your kitchen floor, you need to know the area of the ...The formula for the perimeter of a rectangle is (width + height) x 2, as seen in the figure below: This is the equivalent of adding all four sides, since opposite sides are of equal …Hence, perimeter of the rectangle ABCD. = 2 (12 + 5)cm = 34 cm. Example 15. Find the area of a parallelogram shaped shaded region of Fig. 9.13. Also, find the ...Perimeter is equal to the sum of the sides. For a square this would be equal to four times one Side. 4 X S = PERIMETER. The perimeter for a rectangle can be ...To calculate the isosceles triangle area, you can use many different formulas. The most popular ones are the equations: Given leg a and base b: area = (1/4) × b × √ ( 4 × a² - b² ) Given h height from apex and base b or h2 height from the other two vertices and leg a: area = 0.5 × h × b = 0.5 × h2 × a. Given any angle and leg or base.The perimeter may be found by counting squares along all the edges a shape or by adding up all lengths of the sides of the shape. For a rectilinear compound ...The perimeter formula for a rectangle states that P = (L + W) × 2, where P represents perimeter, L represents length, and W represents width. When you are given the dimensions of a rectangular shape, you can simply plug in the values of L and W into the formula in order to solve for the perimeter.Perimeter of Special Quadrilaterals. By using the above formula we can calculate the perimeter of any quadrilateral. If we are looking to find the perimeter of special quadrilaterals such as rectangle, square, parallelogram, rhombus, trapezoid, and kite, then we can use the formulas given below.The formula for the perimeter of a rectangle is (width + height) x 2, as seen in the figure below: This is the equivalent of adding all four sides, since opposite sides are of equal …Learn how to find the perimeter of a shape by adding up the lengths of all the sides or by multiplying the lengths of some sides. Watch a video tutorial and see examples of …Welcome to How to Find the Perimeter of a Rectangle with Mr. J! Need help with finding the perimeter of a rectangle? You're in the right place!Whether you're...Perimeter is always expressed in the same linear measurement used for the lengths of sides. Perimeter of a rectangle formulas How to find the perimeter of a rectangle. Here we have a rectangle with four vertices, D, U, C, K. Rectangle DUCK. Sides DU and KC are congruent and parallel. Sides DK and UC are also congruent and …19-Aug-2017 ... Share your videos with friends, family, and the world.We can find the perimeter of the square given the area. To find the perimeter of a square using the area, we can follow the steps given below: Step 1: Note down the area of square. Step 2: Calculate the side length using the area. Side = √area; Step 3: Multiply this obtained value of side length, (√area) by 4 and express the answer in units. Find the perimeter of right triangle below. Pythagoras' theorem says that the square of the two shorter sides (legs) on a right triangle is equal to the square of the longest side (the hypotenuse). So if s is the leg that is missing, then s 2 + 5 2 = 8 2 .Welcome to How to Find the Perimeter of a Rectangle with Mr. J! Need help with finding the perimeter of a rectangle? You're in the right place!Whether you're...We know that the opposite sides of a parallelogram are parallel and equal to each other. Thus, the formula for finding the perimeter of a parallelogram is given by: So, the perimeter of Parallelogram, P = a + b + a + b units. P = 2a +2b. P = 2(a+b) Therefore, the perimeter of a parallelogram, P = 2(a+b) units. How to Find Perimeter of ...Learn how to find the area and perimeter of different 2D shapes, such as rectangles, triangles, and circles, using formulas, unit squares, and partial unit squares. …Example 1: calculate the perimeter of a sector (quadrant) Calculate the perimeter of a sector of the sector. Give your answer to 3 decimal places. Find the length of the diameter/radius. Radius = 6cm . 2 Find the size of the angle creating the arc of the sector. Angle = 90^o . Shown by the symbol of the right angle. 3 Find the arc length of the ...To find the perimeter, first convert foot into the equivalent amount of inches. Since, Then apply the formula is equal to the length of one side of the rhombus. The solution is: Find the perimeter of a rhombus that has a side length of. Possible Answers: Correct answer:Nov 27, 2023 · If you need to find the perimeter of a triangle, use the formula p = a + b + c, where a, b, and c are the lengths of the 3 sides of the triangle. Finally, to find the perimeter of a circle, use the formula c = π (d), where c is the perimeter and d is the diameter. P = 2 (a + b) P = 2 (5 + 9) = 2 (14) = 28 units. Example 2: Find the perimeter of a parallelogram when one of its sides is 7 units and diagonals are 8 units and 10 units. Solution: Using the formula when a side and diagonals of a parallelogram are given, we P = 2a + √ (2x 2 + 2y 2 - 4a 2 ). Here a = 7, x = 8, y = 10.The perimeter is the distance all the way around the outside of a 2D shape. To work out the perimeter, add up the lengths of all the sides. The perimeter of this shape is 10 + 10 + 6 + 6 = 32 ... Dec 18, 2023 · Let’s look at a few examples: Square: A square has four equal sides. To find the perimeter, simply multiply the length of one side by 4. Rectangle: A rectangle has two pairs of equal sides. To find the perimeter, add the lengths of two adjacent sides and multiply the sum by 2. Triangle: For a triangle, just add the lengths of all three sides. Learn how to calculate the perimeter of a two-dimensional shape, such as a triangle, a square, a circle or an ellipse, using simple formulas and examples. Find out the difference between perimeter and circumference, and how to use the formulas for different shapes. The perimeter is the total length or distance around a two dimensional shape. In the figure below, the perimeter of each shape is the sum of the lengths of each side, shown in red. The perimeter of a circle or ellipse is called the circumference. For a polygon, the perimeter is the sum of its side lengths. The perimeter of the quadrilateral ...What is the perimeter of the regular pentagon? 9 cm. We can find the perimeter by adding all of the side lengths. All sides of a regular pentagon are the same length. 9 cm 9 cm 9 cm 9 cm 9 cm. Perimeter = 9 + 9 + 9 + 9 + 9. Perimeter = 45 cm.Find the perimeter of a square shaped playground whose each side length 12 m. Solution: We know a square has four equal sides. So, we can easily calculate the perimeter of a square. The formula for finding the perimeter of a …Show step. Counting the units, the length of the rectangle is 6 6 units and the width of the rectangle is 8 8 units. To find the perimeter, add up all the side lengths. 6+6+8+8=28 6 + 6 + 8 + 8 = 28. OR. You can use the formula to find the perimeter of a rectangle; P=2 l+2 w P = 2l + 2w. Jun 21, 2023 · P = D + πr. Where D = the diameter of the semi-circle and two times the radius. r = radius, which is often half the diameter. π = a constant equal to 3.142. The formula for the perimeter of the circle is derived from that of the full circle. The perimeter of a complete circle is the same as the circumference of the circle and is given as. P ... You can also use it to find the area of a circle: A = π × R² = π × 14² = 615.752 cm². Finally, you can find the diameter — it is simply double the radius: D = 2 × R = 2 × 14 = 28 cm. Use our circumference calculator to find the radius when you only have the circumference or area of a circle.We know that the opposite sides of a parallelogram are parallel and equal to each other. Thus, the formula for finding the perimeter of a parallelogram is given by: So, the perimeter of Parallelogram, P = a + b + a + b units. P = 2a +2b. P = 2(a+b) Therefore, the perimeter of a parallelogram, P = 2(a+b) units. How to Find Perimeter of ...Ready to put your math skills to the test? In this lesson, you'll learn all about area and perimeter! You'll explore how to find the area and perimeter of a rectangle. You'll practice labeling rectangles with given information, and you'll even get to flex your problem-solving muscles with some word problems!11-Mar-2022 ... Finding the perimeter of a triangle with only one side ... AB = c, BC = a and AC = b. Construct a perpendicular line to CD from AB, CD ⊥ AB. Then ...Oct 2, 2019 · Learn how to find perimeter with Mr. J. Whether you're just starting out, need a quick refresher, or here to master your math skills, this is the place for s... Example: Find the perimeter of a sector whose area is 324 square units and the radius is 27 units. Solution: Let us find the perimeter of the sector using the following steps: We know that, Area of a Sector of Circle = 1/2 × r 2 θ, where, θ is the sector angle subtended by the arc at the center, in radians, and 'r' is the radius of the circle.Step 1: Find the perimeter, P, of the figure by summing the length of the sides. Step 2: Multiply the perimeter of the figure by the scale factor, s. This gives the perimeter of the figure after ... Hexa comes from the Greek word “Hex” which means “six” in English and “gonia” meaning angles. Therefore, a hexagon has six sides, angles, and vertices. A hexagon with six equal sides is called a regular hexagon. The formula for the Perimeter of Hexagon: P=6×a. Where, a = Length of one side.The perimeter of an object is the measurement of the sides of the object. Measuring the perimeter of a square or rectangle is easy, but measuring the perimeter of a cube is slightl...Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/geometry-home/geometry-area-pe...A square has 4 sides. So, we can set up the problem below to find the perimeter of it. 24 + 24 + 24 + 24 = 96 inches. The perimeter of the square is 96 inches. We need 96 inches of ribbon. We can wrap that amount of ribbon around the box. It will be just enough ribbon to wrap one time around this box.Dec 18, 2023 · Let’s look at a few examples: Square: A square has four equal sides. To find the perimeter, simply multiply the length of one side by 4. Rectangle: A rectangle has two pairs of equal sides. To find the perimeter, add the lengths of two adjacent sides and multiply the sum by 2. Triangle: For a triangle, just add the lengths of all three sides. Multiply the side length by 4 to find the perimeter. Take the side length s you just calculated and plug it into the perimeter formula, P = 4s. The result will be the perimeter of your square! For the square with area 20 and side length 4.472, the perimeter P = 4 * 4.472, or 17.888. For the square with area 25 and side length 5, P = 4 * 5, or 20.The perimeter of a triangle is the total distance around its three outer sides. If a triangle has side lengths equal to D, E and F, then its perimeter is the addition of D, E and F...05-Aug-2011 ... This video explains how to determine the length of the missing sides of an L-shaped polygon from give information and how to determine the ...The perimeter of a circle is called the circumference. The formula for perimeter of a circle is the circumference formula. It is given as: C = 2πr. or: C = πd. Where C is the circumference, r is the radius of the circle, and d is the diameter of the circle. Here is an example of using this formula to find circumference of a circle with a ...Perimeter of Special Quadrilaterals. By using the above formula we can calculate the perimeter of any quadrilateral. If we are looking to find the perimeter of special quadrilaterals such as rectangle, square, parallelogram, rhombus, trapezoid, and kite, then we can use the formulas given below.To find the perimeter (the total distance around the rectangle), add all the side lengths: 10 + 2 + 10 + 2 = 24. The perimeter of the rectangle is 24 units. You can also count each unit of the rectangle to find the perimeter: 2. The perimeter of the rectangle is 94 \, cm. Find the missing side length. 24 \, cm. Mar 25, 2023 · For a circle with a radius of 4cm: C = 2 x 3.14 x 4 = 25.12cm. 2. Find the perimeter of a triangle. Use the equation P = a + b + c for a triangle. For instance, if a triangle has the dimensions a = 20cm, b = 11cm, and c = 9cm, then P = 20 + 11 + 9 = 40cm. 3. Find the perimeter of a square. The formula to find the perimeter of a square is given by: The perimeter of Square = 4s units. Substitute the value of ‘s’ in the perimeter formula, P= 4 × 5 cm. P = 20 cm. Therefore, the perimeter of square = 20 cm. Question 2: Calculate the perimeter of a square having a side of 16 cm. Solution: Given, Side of the square = a = 16 cm The easiest way to calculate the number of acres in your land is to use the calculator above. If you know the length and width, simply enter them. The calculator will provide the number of acres, as well as the area in other units. To calculate acres by hand, multiply your length and width (in feet) to get square feet.Well, how to find perimeter of different shapes is no more complex with our free perimeter to area calculator. What is Perimeter? In mathematics, the perimeter of a shape is defined as the total distance around the shape. Basically, it is the length of any shape, as long as it is expanded linearly. The range of various shapes can be the same in ...Example 1: calculate the perimeter of a sector (quadrant) Calculate the perimeter of a sector of the sector. Give your answer to 3 decimal places. Find the length of the diameter/radius. Radius = 6cm . 2 Find the size of the angle creating the arc of the sector. Angle = 90^o . Shown by the symbol of the right angle. 3 Find the arc length of the ... The perimeter of a polygon can be found by using the following steps: Step 1: Find whether the given polygon is a regular polygon or not. Step 2: If it is a regular polygon, the perimeter can be calculated using the formula, Perimeter of regular polygon = (number of sides) × (length of one side). If the perimeter and the length of a rectangle are known, the width (w) = P/2 - l, where l = length, w = width, and P = perimeter of the rectangle. If the ...We know that the opposite sides of a parallelogram are parallel and equal to each other. Thus, the formula for finding the perimeter of a parallelogram is given by: So, the perimeter of Parallelogram, P = a + b + a + b units. P = 2a +2b. P = 2(a+b) Therefore, the perimeter of a parallelogram, P = 2(a+b) units. How to Find Perimeter of ...The perimeter (P) of a rectangle is the total length of all the sides of the rectangle. Since the opposite sides of a rectangle are equal, a rectangle has two equal lengths and two equal widths. The formula for the perimeter of a rectangle is given below: Perimeter = length + length + width + width. P = l + l + w + w. Or, P = 2 ( l + w)What is the perimeter of the regular pentagon? 9 cm. We can find the perimeter by adding all of the side lengths. All sides of a regular pentagon are the same length. 9 cm 9 cm 9 cm 9 cm 9 cm. Perimeter = 9 + 9 + 9 + 9 + 9. Perimeter = 45 cm.My Geometry course: https://www.kristakingmath.com/geometry-courseIn this video we'll learn how to use the pythagorean theorem to find the lengths of the s...Learn how to find the perimeter of any two-dimensional closed shape using the formula for the perimeter of a circle, a triangle, a square, a rectangle, a parallelogram and a …Feb 18, 2024 · Let's draw a line from one of the top vertices that falls on the bottom base a a a at an angle of 90 ° 90\degree 90°. (Observe how for obtuse trapezoids like the one in the right picture above the height h h h falls outside of the shape, i.e., on the line containing a a a rather than a a a itself. Example: Find the perimeter of a sector whose area is 324 square units and the radius is 27 units. Solution: Let us find the perimeter of the sector using the following steps: We know that, Area of a Sector of Circle = 1/2 × r 2 θ, where, θ is the sector angle subtended by the arc at the center, in radians, and 'r' is the radius of the circle. First, the calculator calculates h = (major radius - minor radius) 2 / (major radius + minor radius) 2 . Then it computes the perimeter as equal to π x (major radius + minor radius) …How Solve Perimeter using Two Sides and One Angle. If two sides and the adjacent angle are known, then the perimeter of the triangle can be found using the Law of Cosines with the formula: p = a + b + (a² + b² – 2 × a × b × cos (γ)) Using the SAS method, the perimeter p is equal to side a plus side b plus the square root of side a ...We know that the opposite sides of a parallelogram are parallel and equal to each other. Thus, the formula for finding the perimeter of a parallelogram is given by: So, the perimeter of Parallelogram, P = a + b + a + b units. P = 2a +2b. P = 2(a+b) Therefore, the perimeter of a parallelogram, P = 2(a+b) units. How to Find Perimeter of ...How Solve Perimeter using Two Sides and One Angle. If two sides and the adjacent angle are known, then the perimeter of the triangle can be found using the Law of Cosines with the formula: p = a + b + (a² + b² – 2 × a × b × cos (γ)) Using the SAS method, the perimeter p is equal to side a plus side b plus the square root of side a ...P = 2 (a + b) P = 2 (5 + 9) = 2 (14) = 28 units. Example 2: Find the perimeter of a parallelogram when one of its sides is 7 units and diagonals are 8 units and 10 units. Solution: Using the formula when a side and diagonals of a parallelogram are given, we P = 2a + √ (2x 2 + 2y 2 - 4a 2 ). Here a = 7, x = 8, y = 10.To find the perimeter of a regular pentagon with sides of length, s, you use this formula: P=5\times s P = 5 × s. In our formula, 5 is the number of sides, and s is the length of the side that we know. Just like with the perimeter of a square, or the perimeter of a polygon in general, you find the perimeter of a pentagon by adding all the ...
Unit test. Test your understanding of Area and perimeter with these % (num)s questions. Area and perimeter help us measure the size of 2D shapes. We’ll start with the area and perimeter of rectangles. From there, we’ll tackle trickier shapes, such …. Cable lat pulldown
A square has 4 sides. So, we can set up the problem below to find the perimeter of it. 24 + 24 + 24 + 24 = 96 inches. The perimeter of the square is 96 inches. We need 96 inches of ribbon. We can wrap that amount of ribbon around the box. It will be just enough ribbon to wrap one time around this box.In Geometry, the perimeter of a two-dimensional shape is defined as the path or boundary that encloses the shape. if the given figure is a polygon such as a triangle, square, rectangle, etc, then the perimeter is the sum of the length of all the sides of a polygon. For example, a triangle with side length 4 cm has a perimeter 4 + 4 + 4 = 12.Many of the low-effort hacks don't actually work. Here's what does. Of all the garden pests, deer can be some of the most frustrating. They don’t care if you’re sprinkling coffee g...The perimeter formulas for different types of triangles are: Perimeter of a Scalene Triangle = a + b + c, where a, b, and c are the three different sides. Perimeter of an Isosceles Triangle = 2a + b, where a is the length of each of the two sides of equal length and b is the third side. Perimeter of an Equilateral Triangle = 3 × a, where a is ... Easily calculate the perimeter of a quadrilateral using our calculator and formula. Enter the values of the four sides to get an instant answer. Learn more now!How to Use Perimeter Calculator? Please follow the below steps to find the perimeter: Step1: Choose a drop-down to find perimeter for different geometry shapes. Step2: Enter the values in the given input box. Step3: Click on the "Calculate" button to find the perimeter. Step4: Click on the "Reset" button to clear the fields and find the perimeter …Perimeter is always expressed in the same linear measurement used for the lengths of sides. Perimeter of a rectangle formulas How to find the perimeter of a rectangle. Here we have a rectangle with four vertices, D, U, C, K. Rectangle DUCK. Sides DU and KC are congruent and parallel. Sides DK and UC are also congruent and …Well, how to find perimeter of different shapes is no more complex with our free perimeter to area calculator. What is Perimeter? In mathematics, the perimeter of a shape is defined as the total distance around the shape. Basically, it is the length of any shape, as long as it is expanded linearly. The range of various shapes can be the same in ...Perimeter Example. Find the perimeter of the rectangle below. We will work the perimeter out using the 3 different ways above: Add up the lengths of each side separately: 7 + 2 + 7 + 2 = 18. Double the lengths of the adjacent sides and add them: double 7 + double 2 = 14 + 4 = 18. Add the adjacent sides and double the answer: double (7 + 2 ...Finding the perimeter of a regular hexagon involves a simple multiplication formula using the measurement of the sides. Formula for Perimeter of a Regular Hexagon: P = S x 6 (where S is equal to ...Welcome to How to Find the Perimeter of a Square with Mr. J! Need help with finding the perimeter of a square? You're in the right place!Whether you're just ...How to Find the Perimeter? Usually, the simplest and most straightforward method is to sum all sides of the shape. However, sometimes there are no edges (such as ellipses, circles, etc.) or one or more edges are unknown. Below are some perimeter equations used with the perimeter calculator to determine the perimeter. Perimeter Types: Regular ... A square has 4 sides. So, we can set up the problem below to find the perimeter of it. 24 + 24 + 24 + 24 = 96 inches. The perimeter of the square is 96 inches. We need 96 inches of ribbon. We can wrap that amount of ribbon around the box. It will be just enough ribbon to wrap one time around this box.Explanation: . The answer is 50 ft. In order to find the perimeter, you must find the length of the left side. After some deduction , you can find that the base of the triangle is 6 ft. Then using the Pythagorean Theorem, or 3-4-5 right triangles, you can find that the height of the triangle and rectangle is 8 ft.Use the formula C = 2πr to find the circumference using the radius. In this formula, "r" represents the radius of the circle. Again, you can plug π into your calculator to get its numeral value, which is a closer approximation of 3.14. A radius is any line segment that extends from the center of the circle and has its other endpoint on the edge of the …Step 1: Find the perimeter, P, of the figure by summing the length of the sides. Step 2: Multiply the perimeter of the figure by the scale factor, s. This gives the perimeter of the figure after ... Perimeter is a math concept that measures the total length around the outside of a shape. To find the perimeter, you add together the lengths of all the sides. This works for any shape, including triangles, rectangles, pentagons, and even irregular polygons. The perimeter of an isosceles triangle is calculated by adding the length of all its three sides. Since an isosceles triangle has two equal sides, its perimeter can be calculated if the base and one equal side is known. The formula used to find the perimeter of an isosceles triangle is: Perimeter of isosceles triangle (P) = 2a + b where, a = the length of the …To calculate the length of a circumference you have to multiply the diameter of the circumference by the Pi: The perimeter of a circle is equal to Pi times the diameter (d): Perimeter of a circle = π x d. You can also multiply 2 by Pi by the radius (r): Perimeter of a circle = 2.π x r, this is because the diameter is double the radius, always.Example 1: calculate the perimeter of a sector (quadrant) Calculate the perimeter of a sector of the sector. Give your answer to 3 3 decimal places. Find the length of the diameter/radius. Radius = 6cm = 6cm. 2 Find the size of the angle creating the arc of the sector. Angle = 90^o = 90o..