Rectangle perimeter calculator

Perimeter is the distance around a two-dimensional shape.

Rectangle — is a quadrangle in which all angles are straight (equal to 90 degrees). In Euclidean geometry, for a quadrilateral to be a rectangle, it is enough that at least three of its angles are straight, then the fourth angle, by the theorem on the sum of the angles of a polygon, will also be 90 °.

The perimeter of a rectangle is the sum of the length and width multiplied by “2”. where “a” is the length of the rectangle, “b” is the width of the rectangle. The sides of the rectangle, which lie opposite each other, we call the length and width. The formula for finding the perimeter of a rectangle is:

P = 2a + 2b

where P is the perimeter, a is the length of the rectangle, and b is the width of the rectangle.

Using the Rectangle Perimeter Calculator

Our rectangle perimeter calculator makes it easy to find the perimeter of your rectangle. To use the calculator:

1. Enter the length of the rectangle in the first box.
2. Enter the width of the rectangle in the second box.
3. The calculator will automatically calculate the perimeter of your rectangle.

Here's an example:

Example: Find the perimeter of a rectangle with a length of 10 units and a width of 5 units.

P = 2a + 2b

P = 2(10+5)

P = 2*15

P = 30

So the perimeter of the rectangle is 30 units.

Rectangle Perimeter Examples

Here are some examples of finding the perimeter of a rectangle using the formula:

Example 1

Find the perimeter of a rectangle with a length of 8 units and a width of 3 units.

P = 2l + 2w

P = 2(8) + 2(3)

P = 16 + 6

P = 22

Example 2

Find the perimeter of a rectangle with a length of 12 units and a width of 6 units.

P = 2l + 2w

P = 2(12) + 2(6)

P = 24 + 12

P = 36

Conclusion

Calculating the perimeter of a rectangle is a fundamental skill in geometry. Our rectangle perimeter calculator and formula make it easy to find the perimeter of your rectangle. Try it out for yourself and see how easy it can be!