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内外弦图
Author:
叶明杰
GeoGebra
New Resources
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
柱體建築師
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（二）
Discover Resources
內擺線
IMO2015C
盾牌
長方體透視圖(三頂點組成三角形)
繡曲線01
Discover Topics
Tangent Line or Tangent
Equilateral Triangles
Rectangle
Linear Equations
Isosceles Triangles