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弦切角定理（题目解答）
Author:
董君
弦切角定理（题目解答）
GeoGebra
New Resources
圓的切線方程
折扣
活动三：应用性质
平行線的判定
双心四边形
Discover Resources
中一︰全等圖形（平移、旋轉、反射）
vector
Hyperbolic Paraboloid 的製作
二次函數圖像 Graph of Quadratic Function
兩條直線垂直應用
Discover Topics
Root
Circumcircle or Circumscribed Circle
General Quadrilateral
Quadratic Functions
Multiplication