CK-12 Geometry-Concepts

3.6. Same Side Interior Angles http://www.ck12.org

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CK-12 Foundation: Chapter3SameSideInteriorAnglesB

Vocabulary

Same Side Interior Anglesare two angles that are on the same side of the transversal and on the interior of the two
lines. Two angles aresupplementaryif they add to 180◦.

Guided Practice

1. Isl||m? How do you know?


2. Find the value ofx.


3. Find the value ofxifm^63 = ( 3 x+ 12 )◦andm^65 = ( 5 x+ 8 )◦.