# exterior angle

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## exterior angle

1. an angle of a polygon contained between one side extended and the adjacent side
2. any of the four angles made by a transversal that are outside the region between the two intersected lines

## exterior angle

[ek′stir·ē·ər ′aŋ·gəl]
(mathematics)
An angle between one side of a polygon and the prolongation of an adjacent side.
An angle made by a line (the transversal) that intersects two other lines, and either of the latter on the outside.
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References in periodicals archive ?
Angles at a circumference subtended by the same chord are only equal in symmetrical figures and the exterior angle of a cyclic quadrilateral does not 'behave' either.
At each of these buildings students are able to take measurements with protractors and string to verify the lengths of the sides and the measures of the central, interior, and exterior angles of the structures.
The design extends the third-story forward, creating distinctive exterior angles.

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