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?

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

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Describe how to decompose a parallelogram to find its area.

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

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

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