Alternate Exterior Angles - Mathwords

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Alternate Exterior Angles

In the drawing below, angles 1 and 8 are alternate exterior angles, as are angles 2 and 7. Alternate exterior angles are congruent. Formally, alternate exterior angles are defined as two exterior angles on opposite sides of a transversal which lie on different parallel lines.

Parallel lines cut by a transversal

See also

Alternate interior angles, consecutive interior angles
this page updated 15-jul-23 Mathwords: Terms and Formulas from Algebra I to Calculus written, illustrated, and webmastered by Bruce Simmons Copyright © 2000 by Bruce Simmons All rights reserved

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