External Angle of a Triangle

主題：角度

You can move the points of the triangle around, and you'll see that the measure of an exterior angle is always equal to the sum of the two opposite interior angles.

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calculus
copy of perpendicular line through a point
Pithagoras' circles
Untitled
Heat Index

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乘法
代數
算術運算
圖
函數

External Angle of a Triangle

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