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Author:
keith leung
,
Tim Brzezinski
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GeoGebra
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兩位數除以一位數（一）
兩組對邊相等的四邊形
找出對稱軸
兩組對邊相等和有直角的四邊形
錐體建築師
Discover Resources
乘法公式2
四心的變化II
劉虹圻 旁心
基础知识
七巧板的副本
Discover Topics
Symmetry
Geometric Distribution
Pythagoras or Pythagorean Theorem
Solids or 3D Shapes
Variance