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Perimeter of Polygons


Videos 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

Related Topics:
Lesson Plans and Worksheets for Grade 3, Lesson Plans and Worksheets for all Grades, More Lessons for Grade 3, Common Core For Grade 3

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

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.
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?

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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