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proof 64 潘研
Author:
郭亮偉
GeoGebra
New Resources
異分母分數減法
柱體建築師
球體建築師
三位數除以一位數（一）
判斷球體
Discover Resources
正弦定理的验证
共垂心
分數加法
三角形的面積
平面切割正立方體
Discover Topics
Vectors 2D (Two-Dimensional)
Translation
Continuity
Straight Lines
Geometric Distribution