Instructional Activity# Example 2: Decomposing Polygons into Rectangles and Triangles

Lesson 5. Unit 5. Grade 6 EngageNY

EngageNY10 min(s)

This Instructional Activity is a part of the Lesson 5, Unit 5, Grade 6. In this example, a parallelogram is bisected along a diagonal. The resulting triangles are congruent, with the same base and height of the parallelogram. Students should see that the area for a parallelogram is equal to the base times the height, regardless of how much the bases are skewed. Ask how we could find the area using only triangles.