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Author:Jensen Wong

Topic:Orthocenter

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【案例】2018年全国1卷理科12题
三位數除以一位數（二）
畫出對稱圖形
兩位數除以一位數（二）
第八周作业

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Angle of Elevation & Angle of Depression 仰角和俯角
pentagon
算幾不等式
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S3 Ex4.3 Q04(3D圖)

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Planes
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