Finding the Area of a Parallelogram by Decomposing into a Rectangle

This lesson teaches how to find the area of a parallelogram by decomposing it into a rectangle. It reviews the concept of area as the number of square units within a shape and explains how to calculate the area of a rectangle using multiplication. The lesson highlights common mistakes in finding the area of a parallelogram and emphasizes the importance of using the base and height, which must be perpendicular. An example is provided where a parallelogram is decomposed into a rectangle to find its area, reinforcing the concept with practical application.

What is the method to find the area of a rectangle?

Explain the common mistake students make when calculating the area of a parallelogram.

Describe how to decompose a parallelogram to find its area.

What are the dimensions of the rectangle formed when decomposing the parallelogram in the example?

How do you calculate the area of the parallelogram after decomposing it into a rectangle?