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Areas of Parallelograms and Trapezoids

The area formulas for parallelograms and trapezoids can be expressed graphically. Move the slider to see the shapes transform into a rectangle of the same area as the original figure.

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"Areas of Parallelograms and Trapezoids" from the Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/AreasOfParallelogramsAndTrapezoids/
Contributed by: Helen Papadopoulos
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Related Curriculum Standards

Common Core State Standards for Mathematics
 
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