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三角形的三角和及外心、內心圓
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兩組對邊相等和有直角的四邊形
四邊形的特性
柱體建築師
找出對稱軸
判斷球體
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交點的極限
Angle between a Line and a Plane 投影與線面角
Translation, Reflection and Rotation
作线段和角
一半模型归纳
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Trigonometry
Secant Line or Secant
Circle
Matrices
Similar Triangles