Lessons

Find the perimeter of a polygon
In this lesson, you will learn how to find the perimeter of a polygon by using grid paper.

Find the perimeter of a square or rectangle by adding side lengths
In this lesson, you will learn how to find the perimeter of a square or rectangle by adding the side lengths.

Find perimeter with missing side lengths
In this lesson, you will learn how to find the perimeter of a square or rectangle with a missing side length by using square tiles.

Find the perimeter of a polygon with more than 4 sides
In this lesson, you will learn how to find the perimeter of a polygon with more than 4 sides by adding the side lengths.

Use a chart to understand how rectangles can have the same perimeter with different areas
In this lesson you will learn that rectangles can have the same perimeter but different area by building rectangles and organizing information in a chart.