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等腰直角三角形与双垂线
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方程
GeoGebra
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錐體建築師
第八周作业
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
四邊形的特性
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Primary School Geo
高中數學_高二上
test1(尋找北極星)
Apollonius Problem 6 CLP Inversion 12
GGB DAY3
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Pyramid
Parametric Curves
Angles
Sphere
Scalene Triangles