三角形的正弦面积公式

Topics in 三角形的正弦面积公式

Numbered in the order to learn them.

  1. 从弧线到角度和量角器

  2. 什么是构造几何?

  3. $sin \ cos \ tan$: Graphing Calculator

  4. 什么是点、直线、线段和射线?

  5. Circumcenter & incenter

  6. Third angle theorem

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