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題 2
Author:
HYHivy
,
GeoGebra Institute of Hong Kong
計算下圖的面積。
GeoGebra
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異分母分數減法
球体的体积推导（优化版）
兩位數除以一位數（二）
球體建築師
判斷球體
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直线与椭圆
三角形移動多一格
空間向量座標
slope
Light reflected in hyperbola
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Integral Calculus
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