Finding the Area of Trapezoids by Composing a Parallelogram

This lesson teaches how to find the area of a trapezoid by composing it into a parallelogram or rectangle. It reviews the area calculation for rectangles and parallelograms, then demonstrates how to create a congruent trapezoid to form a larger shape. The lesson includes examples with regular and isosceles trapezoids, emphasizing the importance of dividing the area of the larger shape to find the trapezoid's area. Common mistakes in the process are highlighted, and the lesson concludes with a summary of the learned concepts.

How do you find the area of a parallelogram?

What is the formula for finding the area of a trapezoid?

What happens to the orange and yellow lines when you create a congruent trapezoid and flip it?

Explain the process of finding the area of an isosceles trapezoid.

What is a common mistake when decomposing a trapezoid to find its area?