Triangle Sum Proof (using transversals)

主題：幾何

Use this dynamic activity to explore how you can prove that a the sum of the interior angles of a triangle is 180 degrees, using transversals of parallel lines.

探索資源

Increasing sides of polygon to infinity.
Ratios - Scale and Proportion
Finding Slope 5
Pyramid section
Parallel Lines in the Coordinate Plane: Quick Exploration

探索主題

一般四邊形
統計
立方（體）
正三角形
角柱

Triangle Sum Proof (using transversals)

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