Compound shapes

Learning Material  |  Interactive Lesson

Select from three levels of complexity for working with polygons. Estimate the area of a randomly-generated polygon. Try counting squares on a grid to help your estimate. Cut the shape into rectangles and triangles. Use a formula to calculate the exact area for each of the simple shapes. Then find the total area for the original polygon. Try dividing the shape again into fewer pieces. This learning object is a combination of three objects in the same series.
1. Students identify rectangles and triangles that comprise compound polygons.
2. Students cut compound polygons into triangles and rectangles in a number of different ways.
3. Students estimate the area of compound polygons.
4. Students apply formulas for the area of rectangles and triangles to calculate the area of compound polygons.

Curriculum Information

K to 12
Grade 7, Grade 8, Grade 9, Grade 6
Geometry Measurement
Educators, Learners, Students

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