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相似三角形的构造01.许兴华数学
Author:
许兴华数学
Topic:
Triangles
GeoGebra
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異分母分數減法
四邊形的特性
第八周作业
兩位數除以一位數（二）
柱體建築師
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領結的角度
Escher 階梯
反射(鉛垂線、水平線及斜線) Reflection (vertical line, horizontal line and line)
瓜豆原理——动点跟随
椭圆抛物面
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Optimization Problems
Plane Figures or Shapes
Congruence
Hypergeometric Distribution
Conditional Probability