Area of a Trapezoid 2.

The second derivation of the area of a triangle above can be modified to show that the area of a trapezoid is the average of the bases times the height. 

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Rectangle :  Parallelogram :  Triangle 1. :  Triangle 2.  :  Trapezoid 1.  :  Trapezoid 2. :  Circle 1. :  Circle 2.

Animations by Bettina Richmond and Tom Richmond. 
Tom.Richmond@wku.edu
Updated May 22, 2008.