10.

Perimeter of Regular Figures - 3rd Grade Math

Practice finding perimeter of polygons with equal side lengths. Students begin with adding up the side lengths to find the perimeter. For regular shapes, students can also multiply the side length by the number sides to determine the perimeter.

Common Core Alignment

3.MD.8Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.