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三角形的垂心
Author:
大園數學
垂心是三個高的交點
GeoGebra
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【案例】2018年全国1卷理科12题
兩位數除以一位數(一)
算柱 (兩位數)
異分母分數減法
【案例】圆柱体内放置一个大球六个小球
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Constructing Quadrilaterals by Four Sides (2014)
四邊形的特性
人教A版3.1.3,空间向量的数量积分配律
分數與百分數的分別
诱导公式六(90°-α)
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Vectors 2D (Two-Dimensional)
Translation
Quadrilaterals
Cone
Ratios