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半圆的滚动
Author:
孟宝兴
GeoGebra
New Resources
畫出對稱圖形
兩位數除以一位數（一）
三位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
四邉形 (四年級) 教師版
Discover Resources
東興那題的圖
Introduce Tangent Ratio
Closure shape
test
Ex5D#6
Discover Topics
Set Theory
Planes
Complex Numbers
Equilateral Triangles
Arithmetic Operations