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Trapeziums
作者:
jasmine
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梯形
Formulars Area= (upper base + lower base) * height / 2 Height= Area * 2 / ( upper base +lower base ) Upper base= Area * 2 / height - lower base Lower base= Area * 2 / height - upper base
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Regular Star Polygons
The Geometry of the Coefficients of a Quadratic Function
z`]]
apec
Random Polar Curve (1)
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Animated Pythagoras' Theorem Jigsaw Puzzle
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Geogebra 3
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