CK-12 Geometry-Concepts

3.2. Perpendicular Lines http://www.ck12.org

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CK-12 Foundation: Chapter3PerpendicularLinesB

Vocabulary

Two lines areperpendicularif they meet at a 90◦, orright, angle.

Guided Practice

1. Isl⊥m? Explain why or why not.


2. Find the value ofx.


3. Find the value ofx.