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 as triangles and circles.

What I want to do in this video is a fairly straightforward primer on perimeter and area. And I'll do perimeter here on the left, and I'll do area here on the right.

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 …

Practice Up next for you: Area and perimeter situations Get 3 of 4 questions to level up!

Area is about the inside (how much space the shape covers). Perimeter is about the outside (how long it is to walk around the shape).

Get ready to draw the line--the perimeter line, that is! This unit will walk you through everything you need to know about measuring the distance around shapes and finding out how big (or …

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 as triangles and circles.

Learn how to calculate the perimeter and area of rectangles with interactive lessons and examples on Khan Academy.

What I want to do in this video is a fairly straightforward primer on perimeter and area. And I'll do perimeter here on the left, and I'll do area here on the right.

2D figures have area and perimeter to describe the measurements of their interiors and exteriors. With 3D figures, we use volume and surface area for the same ideas. We'll find fractional …