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Similar triangles reasons
Author:
lamanleung
GeoGebra
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垂直線的斜率
画直线等分三角形的面积
三角函数 的副本
直線的斜率：水平變化 & 鉛垂變化
讀磅
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公切線長度的計算
refraction law
加減併式與估算
平面区域的理解
畢氏定理
Discover Topics
Pie Chart or Circle Chart
Diagrams
Orthocenter
Parabola
Hyperbola