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3-3-09
Author:
Tzuen Hsu
GeoGebra
New Resources
錐體建築師
兩組對邊相等的四邊形
拼砌四邊形
兩位數除以一位數（二）
兩位數除以一位數（一）
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平面
蝴蝶定理
test05
勒洛三角形頂點B軌跡
和两个圆都相切的圆
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Reflection
Congruence
Numbers
Triangles
Fractions