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you are here > Class Notes - Chapter 11 - Lesson 11-3 |  |
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Area of a Trapezoid - Lesson 11-3 Today we talked about the area of a trapezoid. To find this, we started with a trapezoid (the red one), made a copy of it (the yellow one), and rotated it 180 degrees:
Next, we translated it up to form a parallelogram (the combination of both trapezoids). Using the parallelogram area formula, we were able to find a formula for the area of the trapezoid:
We then defined a median of a trapezoid and learned about two of its properties:
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