Exterior angles (when transversal intersects two parallel lines)

Last updated at August 14, 2026 by

Let's take the same figure - line l and m are parallel.

And line p is the transversal.

56.jpg

Exterior angles are angles which are

 outside lines l & m

 

So, ∠1, ∠2, ∠7, ∠8 are exterior angles

 

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