Find the perimeter of the figure calculator

geometry

rectangle

What I want to Find Perimeter Area Diagonal

Please pick an option first What is Given w l What is Given w l What is Given w l

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Rectangle Shape

Calculator Use

Use this calculator if you know 2 values for the rectangle, including 1 side length, along with area, perimeter or diagonals and you can calculate the other 3 rectangle variables. A square calculator is a special case of the rectangle where the lengths of a and b are equal.

Units: Note that units of length are shown for convenience. They do not affect the calculations. The units are in place to give an indication of the order of the calculated results such as ft, ft2 or ft3. Any other base unit can be substituted.

Rectangle Formulas

Area of a rectangle:

A = ab

Perimeter of a rectangle:

P = 2a + 2b

Polygon diagonals of a rectangle:

p = q = √(a2 + b2)

Rectangle Calculations

• Calculate A, P, p | Given a, b
  Given sides lengths a and b calculate area, perimeter and diagonals
  • A = ab
  • P = 2a + 2b
  • p = q = √(a2 + b2)
• Calculate P, p, b | Given A, a
  Given area and side length a calculate perimeter, diagonals and side b
  • b = A / a
  • P = 2a + 2b
  • p = q = √(a2 + b2)
• Calculate P, p, a | Given A, b
  Given area and side length b calculate perimeter, diagonals and side a
  • a = A / b
  • P = 2a + 2b
  • p = q = √(a2 + b2)
• Calculate A, p, b | Given P, a
  Given perimeter and side length a calculate area, diagonals and side b
  • b = (P - 2a) / 2
  • A = ab
  • p = q = √(a2 + b2)
• Calculate A, p, a | Given P, b
  Given perimeter and side length b calculate area, diagonals and side a
  • a = (P - 2b) / 2
  • A = ab
  • p = q = √(a2 + b2)
• Calculate A, P, b | Given p, a
  Given diagonals and side length a calculate area, perimeter and side b
  • b = √(p2 - a2)
  • A = ab
  • P = 2a + 2b
• Calculate A, P, a | Given p, b
  Given diagonals and side length b calculate area, perimeter and side a
  • a = √(p2 - b2)
  • A = ab
  • P = 2a + 2b

Perimeter is defined as the total length of the boundary of a closed shape.

What is Perimeter Calculator?

'Perimeter Calculator' is an online tool that helps to calculate the perimeter of a given geometry shape. Online Perimeter Calculator helps you to calculate the perimeter within a few seconds.

Perimeter Calculator

NOTE: Enter values upto three digits only.

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 for different geometry shapes.

How to Find Perimeter?

It can also be defined as the total distance around the shape. There are different geometry shapes to find the perimeter.

1. Perimeter of the triangle: It is defined as the sum of its boundary or all three sides. The formula to calculate the perimeter of the triangle is:

Perimeter of the triangle = sum of all three sides of a triangle = a + b + c unit(s)

Where a, b, and c are lengths of the sides of a triangle.

2. Perimeter of a square: It is defined as the total length of all four sides of a square. Hence we can find the perimeter by adding all four sides of a square. As all sides of a square are equal. The formula to calculate the perimeter of a square is:

Perimeter of a square = side+side+side+side = (4 × side)units

3. Perimeter of a rectangle: It is defined as the total length or distance of its boundary on all sides. As opposite sides are equal. The formula to calculate the perimeter of a rectangle is: 

Perimeter of a rectangle = 2(Length + breadth) units

4. Perimeter of quadrilateral: It is defined as the total length or distance of its boundary on all sides. The formula to calculate the perimeter of a quadrilateral is: 

Perimeter of quadrilateral = a + b + c + d unit(s)

Where a, b, c, and d are lengths of the sides of the quadrilateral.

5. Perimeter of a circle: It is defined as its boundary or the complete arc length of the periphery of a circle. It is also known as the circumference of a circle. The formula to calculate the perimeter of a circle is: 

The perimeter of a circle = 2 π r

Where r is the radius of the circle.

6. The perimeter of the polygon: It is defined as the sum of all the sides of the n polygon. The formula to calculate the perimeter of the polygon is

The perimeter of the polygon = sum of all sides of n polygon

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Solved Examples on Perimeter Calculator

1. Example1:
   Find the perimeter of a triangle if a = 4 units, b = 5 units, and c = 7 units
   Solution:
   Given: a = 4, b = 5, c = 7
   The perimeter of a triangle = sum of all three sides of a triangle
   = 4 + 5 +7
   = 16 units

2. Example2:
   Find the perimeter of a circle whose radius is 5units?
   Solution: 
   Given: r = 5 units
   The perimeter of a circle = 2 π r
   = 2 × 3.14 × 5
   = 31.4 units

3. Example3:
   Find the perimeter of an 8-sided polygon whose length of the side is 7 units?
   Solution:
   Given: 8-sided polygon, length = 7 units
   = 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7
   = 7 × 8
   = 56 units

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Similarly, you can try the calculator to find the perimeter for:

• Find perimeter of quadrilateral whose sides a = 2 units, b = 5 units, c = 6 units, and d = 8 units
• Find the perimeter of a rectangle whose length = 8 units and breadth = 7 units

☛ Related Articles:

• Perimeter
• Perimeter of a triangle
• Perimeter of a square
• Perimeter of a circle

☛ Math Calculators:

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