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Orthocentre

Author:Big Lee

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【案例】2018年全国1卷理科12题
探究三角形的全等條件
空间中两直线的位置关系
祖冲之的期望：内棋与外棋
直線的斜率

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相似三角形: 重溫
test05繪本用
The Beautiful Dance of the Earth and Venus
Copy of 費氏螺旋 (試算表)
高中二年級平面向量的副本

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Median Value
Geometric Mean
Vectors 2D (Two-Dimensional)
Polynomial Functions
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