| 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. |   Angles 3, 4, 5, and 6 are interior angles; angles 3,6 and 4,5 are alternate interior angles. |
interior angle
n
1. (Mathematics) an angle of a polygon contained between two adjacent sides
2. (Mathematics) any of the four angles made by a transversal that lie inside the region between the two intersected lines
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. |  Angles 3, 4, 5, and 6 are interior angles. Angles 3 and 6 and angles 4 and 5 are alternate interior angles. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  interior angle - the angle inside two adjacent sides of a polygonangle - 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 |
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