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垂心(劉虹圻623)

Author:呂麗珠

Topic:Orthocenter

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【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
球體建築師
拼砌四邊形

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葉子型
四下_面積（一）(教師版)
circle
拋物線5--包絡線法
三角形的概念

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Tree Diagrams
Interest Calculation
General Quadrilateral
Straight Lines
Fractions

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