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Perimeter of Polygons

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Lesson Plans and Worksheets for Grade 3
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Common Core For Grade 3

Examples, videos and solutions to help Grade 3 students learn how to measure side lengths in whole number units to determine the perimeter of polygons.

Common Core Standards: 3.G.1

New York State Common Core Math Grade 3, Module 7, Lesson 12

Worksheets for Grade 3

Concept Development

How to find the perimeter of a polygon?


1. Measure and label the side lengths of the shapes below in centimeters. Then find the perimeter of each shape.

2. Melinda draws two trapezoids to create the hexagon shown below. Use a ruler to find the side lengths of Melinda’s hexagon in centimeters. Then find the perimeter.

3. Victoria and Eric draw the shapes shown below. Eric says his shape has a greater perimeter because it has more sides than Victoria’s shape. Is Eric right? Explain your answer.

4. Jamal uses his ruler and a right angle tool to draw the rectangle shown below. He says the perimeter of his rectangle is 32 centimeters. Do you agree with Jamal? Why or why not?

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