interior angle

interior angle n. 1. Any of the four angles formed between two straight lines intersected by a third straight line. 2. The angle formed inside a polygon by two adjacent sides.

interior angle Angles 3, 4, 5, and 6 are interior angles; angles 3,6 and 4,5 are alternate interior angles.

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interior angle

Noun

an angle of a polygon contained between two adjacent sides

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interior angle  (n-tîr-r) 1. Any of the four angles formed inside two straight lines when these lines are intersected by a third straight line. 2. An angle formed by two adjacent sides of a polygon and included within the polygon. Compare exterior angle.

interior angle Angles 3, 4, 5, and 6 are interior angles. Angles 3 and 6 and angles 4 and 5 are alternate interior angles.

Thesaurus

Noun

1.

interior angle - the angle inside two adjacent sides of a polygon internal angle angle - the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians reentering angle, reentrant angle - an interior angle of a polygon that is greater than 180 degrees