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IGD: Perpendicular Lines

Grade:
9-12
Standards:
Geometry
Math Content:
Geometry

Two lines are perpendicular if they meet at right angles.

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The two lines in the applet below are perpendicular. You can drag points A, B, or P to change the lines, but notice that the angle formed by the lines will always measure 90°.

How Do You Construct Perpendicular Lines?  

What Are Some Applications of Perpendicular Lines?