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三節棍
Author:
chen mingchuan
GeoGebra
New Resources
柱體建築師
拼砌四邊形
兩位數加法
兩位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
Discover Resources
拿破崙三角形
Angle between 2 planes
Mathematics and Optics (and their applications)
固定三角形的條件−題1的副本
雙曲線2--焦點法
Discover Topics
Congruence
Surface
Orthocenter
Ellipse
Tree Diagrams