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利用邊對摺找三角形的內心
Author:
arist
GeoGebra
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圓周公式的應用
探究三角形的全等條件
漂亮的摇摆曲线
三角函数 的副本
直線的斜率：水平變化 & 鉛垂變化
Discover Resources
sine graph 變換
Yeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
平行四邊形的面積
test07
congruent triangle_provided by Mr Yeung Kar Chun
Discover Topics
Special Points
Planes
Upper and Lower Sum or Riemann Sum
Rational Numbers
Geometric Transformations