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三角形
Author:
ecufecl
Topic:
Triangles
三角形A
GeoGebra
三角形B
New Resources
兩組對邊相等的四邊形
找出對稱軸
三位數除以一位數（一）
拼砌四邊形
第八周作业
Discover Resources
Field function 展示
黎曼和
Rotational symmetry examples
功課
Angles in a Circle:Property 1
Discover Topics
Cylinder
Arithmetic Operations
Vectors
Perimeter
Rotation