Areas of Parallelograms and Trapezoids
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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.
Contributed by: Helen Papadopoulos (March 2011)
Open content licensed under CC BY-NC-SA
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"Areas of Parallelograms and Trapezoids"
http://demonstrations.wolfram.com/AreasOfParallelogramsAndTrapezoids/
Wolfram Demonstrations Project
Published: March 7 2011
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Ratio of Areas in a Square
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Rectangles: Perimeter and Area
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The Area of a Square in a Square
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Area of a Hexagon Formed by the Vertices and Altitude Extensions of a Triangle
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Ratios of the Areas of an Internal Hexagon to Its Star to the External Hexagon
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