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Generalizing Area of Polygons

Generalizing Area of Polygons
Why are there so many different formulas for area? You can help students by focusing on a general formula.
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Area of Circles and Ellipses

Area of Circles and Ellipses
A ratio can help you find the area of any circle or ellipse.
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Estimate Pi

Estimate Pi
Help students estimate the value of pi by comparing a circle to a square or hexagon.
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