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周界
Author:
suefuk
,
Anthony OR 柯志明
,
kennylau
,
Choy Wai Yan
GeoGebra
GeoGebra
New Resources
找出對稱軸
兩位數除以一位數（一）
三位數除以一位數（一）
錐體建築師
【案例】2018年全国1卷理科12题
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三角形重心(相關說明)
Angle of Elevation & Angle of Depression 仰角和俯角
三角形的內心
hello
圆的有关概念
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Means
Parallelogram
Rotation
Surface
Cosine