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三角形内角和（平行线）

Author:刘博书

三角形内角和平行线证明法

New Resources

球体的体积推导
祖冲之的期望：内棋与外棋
球体的体积推导（优化版）
垂直線的斜率
探究三角形的全等條件

Discover Resources

標準分解式與方根化簡
高二上線性規劃_10
面積切割
Box method for multiplication
arithmetic operation

Discover Topics

Scalene Triangles
Kite
Arithmetic Operations
Definite Integral
Incircle or Inscribed Circle

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