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三個圓上的正三角形
Author:
張威
GeoGebra
New Resources
圓周公式的應用
【案例】圆柱体内放置一个大球六个小球
多邊形的面積
三位數除以一位數（二）
垂直線的斜率
Discover Resources
七巧板（tangram）
實驗與觀察
鏡射矩陣
Angle between 2 planes
Lesson02 absolute value function
congruent triangle2_provided by Mr Yeung Kar Chun
Discover Topics
Function Graph
Natural Numbers
Hyperbola
Cylinder
Tree Diagrams