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Angle at Centre Twice Angle at Circumference
Author:
Eric Chiu
GeoGebra
New Resources
双心四边形
龙形曲线-分形龙2
圓周公式的應用
圓的基本性質
直線的斜率：水平變化 & 鉛垂變化
Discover Resources
滾出直線之3
乘法
奈格爾點與葛爾崗點互為等距共軛點
正方形所夾三角形面積相等
排數咭遊戲_多位數
Discover Topics
Quadratic Functions
Tree Diagrams
Symmetry
Centroid or Barycenter
Mode