Compound shapes: large shapes

Learning Material  |  Interactive Lesson

Estimate the area of a highly complex 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 the last in a series of three objects that progressively increase in difficulty.
1. Students identify rectangles and triangles that comprise compound.
2. Students understand that compound polygons can be cut 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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