Unit 7, Lesson 18, Grade 3 icon
Unit 7, Lesson 18

Construct rectangles from a given number of unit squares and determine the perimeters

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In this lesson, students use a given number of unit squares to build and determine different perimeters of rectangles. (For example, given a rectangle composed of 24 unit squares, students find there are four possible perimeters: 50, 28, 22, and 20 length units.) Then they draw their rectangles on grid paper and draw conclusions about the relationship between area and perimeter of a rectangle.

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