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與三個半圓相切之圓家封閉面積
Author:
張道民
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球
算柱 (兩位數)
兩位數除以一位數（二）
球體建築師
Discover Resources
尋找等腰三角形 Isosceles Triangle Hunt
蝴蝶定理
永春高中研習
圓錐曲線圖輯
弓形的滚动
Discover Topics
Tangent Function
Intersection
Ratios
Trigonometric Functions
Incircle or Inscribed Circle