Common Core Alignment:.

3.MD.6:

Measurement And Data

Geometric Measurement: Understand Concepts Of Area And Relate Area To Multiplication And To Addition.

Measure areas by counting unit squares (square cm, square m, square in, square ft, and improvised units).

3.MD.8:

Measurement And Data

Geometric Measurement: Recognize Perimeter As An Attribute Of Plane Figures And Distinguish Between Linear And Area Measures.

Solve 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.