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翰林數學_2下_CH3-1_三角形的外角定理
Author:
翰林數學
GeoGebra
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【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
柱體建築師
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鏡射
相對與絕對角速度
How to draw an octagon with ruler and compasses?
第四冊4-1習題8(2)
khkhk
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Line Segment
Inequalities
Special Points
Centroid or Barycenter
Difference and Slope