AlgebraLab

Converse of Same-Side Interior Angles Theorem

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Pronunciation: CON•verse OF SAME-SIDE in•TER•i•or AN•gles THE•o•rem

Definition

if two lines are cut by a transversal so that a pair of same side interior angles are supplementary, then the lines are parallel.

Example

If angle 2 and angle 4 are supplementary, then line L is parallel to line M