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圖四

Author:GeoGebra Institute of Hong Kong

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兩組對邊相等和有直角的四邊形
算柱 (兩位數)
兩組對邊相等的四邊形
兩位數除以一位數（二）
四邊形的特性

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畢式定理 (04)
四連桿(可調)
九點圓
线段
Trigonometric Relations(180,360)

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Random Variables
Rectangle
Planes
Real Numbers
Probability

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