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Vertical angles lie diagonally opposite one another at an intersection. Vertical angles are always equal in measure. When angles are equal in measure, we say they are congruent.

These resources are part of KET's **Measurement and Geometry** collection.

This video segment originally appeared in KET’s *GED Connection* series.

This video is available in both English and Spanish audio, along with corresponding closed captions.

Producer:

© 2014 PBS & WGBH Educational Foundation. All rights reserved.

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