CK-12 Geometry-Concepts

http://www.ck12.org Chapter 1. Basics of Geometry

1.9 Linear Pairs

Here you’ll learn what linear pairs are and how they can help you to solve problems.

What if you notice two angles in a picture that make a straight line? What information does this give you about
the angles? After completing this Concept, you’ll be able to apply the properties of linear pairs to help you solve
problems.

Watch This

MEDIA

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URL: http://www.ck12.org/flx/render/embeddedobject/52600

CK-12 Foundation: Chapter1Linear PairsA

MEDIA

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URL: http://www.ck12.org/flx/render/embeddedobject/1274

James Sousa: Linear Pairs

Guidance

Adjacent anglesare two angles that have the same vertex, share a side, and do not overlap. In the picture below,

(^6) PSQand (^6) QSRare adjacent.
Alinear pairis two angles that are adjacent and whose non-common sides form a straight line. If two angles are a
linear pair, then they are supplementary.