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Author:Sara Anne Thomas, Jason Wofsey

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Building Trapezoids with Set Areas
Regular Polygons and Equivalent Triangles
Area of a Circle Illustrated
Building Parallelograms with Set Areas
Perimeter of Rectangle

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The Theorem of Pythagoras by shear mapping
Area and Perimeter of Quadrilaterals
Testing Pythagoras' Theorem
functionkind
Hafaliad Cylch

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Addition
Prism
Natural Numbers
Sphere
Coordinates

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