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以「時」和「分」報時
Author:
GeoGebra Institute of Hong Kong
GeoGebra
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球体的体积推导（优化版）
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
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K9@cn
柱體和錐體
Angles formed by parallel lines and transversal
circle
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Cone
Square
Geometry
Hyperbola
Continuity