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Angle (Extended 1)
Author:
Chan Kwan Ho
GeoGebra
New Resources
兩組對邊相等的四邊形
判斷球體
球体的体积推导（优化版）
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
Discover Resources
y=a(x-h)²+k的圖形
M05E Rate of Change
Copy of 閱讀鐘面及數字鐘（時和分）
進階一
扇形柱(調整底面圓的分割數，柱高)