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正方形所夾三角形面積相等
Author:
vinnyya
GeoGebra
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画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
拼砌四邊形
兩位數除以一位數（一）
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莫雷角三分線定理
尋找三角形的內切圓
例题1
parallel
圓周 (圖形F) 的複本
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Root
Tangent Function
Similar Triangles
Linear Functions
Step Functions