Learn the formula to find the perimeter of a rectangle. Explore examples of how to calculate a rectangle's perimeter.

Learn about perimeter, how to use mathematical formulas to calculate the perimeter of triangles and rectangles, and how to use perimeter to determine the length of unknown polygon sides.

Learn how to find the perimeter from the area of a given shape. Understand the stepwise method of calculations for some common shapes like square, rectangle, circle, and triangle.

Learn how to find the perimeter of a rectangle in coordinate plane with no sides horizontal or vertal, and see examples that walk through sample problems step-by-step for you to improve your math ...

Explore the area and perimeter of a rectangle in this 5-minute video. Learn the formulas and methods for calculating them, with examples, then take a quiz.

One of the first things we learn in math is how to calculate the area and perimeter of a figure. For example, we can find the area of a rectangle by multiplying its length times its width.

Learn how to calculate the perimeter of a quadrilateral in an engaging video lesson. Watch now to master the formula with clear examples, followed by a quiz.

Learn how to distinguish between the area and perimeter of a rectangle, and see examples that walk through sample problems step-by-step for you to improve your math knowledge and skills.

Learn how to find the area of a rectangle. This lesson explains the formula for determining the area of a rectangle and includes examples of its use.

The perimeter of a geometric figure is the total length of all of its sides. For a rectangle, there are two sides having length ℓ and two sides having width w.