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祖冲之的期望：内棋与外棋
Author:
孟宝兴
GeoGebra
New Resources
柱體建築師
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
兩位數加法
兩位數除以一位數（二）
Discover Resources
數學題目的模型
內外切圓
vector stack pile
正多邊形各邊中點連線所圍成的圖形v2
S0G4L2 到两点距离的运算为定值
Discover Topics
Translation
Area
Angles
Pythagoras or Pythagorean Theorem
Step Functions