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Introduce tangent ratio
Author:
VCChung
GeoGebra
New Resources
直角坐標平面上的旋轉變換
算柱 (兩位數)
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
四邊形的特性
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test
三角形内切圆
平面截正立方体
sin(x) 的函數圖形 的複本
椭圆规
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Functions
Hypergeometric Distribution
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Cube
Linear Regression