Unit 1, Lesson 16, Grade 3 icon
Unit 1, Lesson 16

Find the perimeter of polygons

North Carolina Department of Public Instruction 54 min(s)

By the end of the lesson students will be able to find the perimeter of a polygon, explain that perimeter is a measurement of length around a figure. Materials: Twine or non-stretchy string (24 inches per pair), pattern blocks (2 hexagons, 3 blue rhombi, 4 triangles, and 2 trapezoids per pair), rulers, equilateral triangle grid paper, markers or crayons. Before introducing the Opening Problem, cover the shapes with pattern blocks. Choose a student volunteer to demonstrate holding the pattern blocks while guiding the string around the figure.

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