# interior angle

(redirected from Interior angles)
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Related to Interior angles: exterior angles

## interior angle

1. an angle of a polygon contained between two adjacent sides
2. any of the four angles made by a transversal that lie inside the region between the two intersected lines

## interior angle

[in′tir·ē·ər ′aŋ·gəl]
(mathematics)
An angle between two adjacent sides of a polygon that lies within the polygon.
For a line (called the transversal) that intersects two other lines, an angle between the transversal and one of the two lines that lies within the space between the two lines.
References in periodicals archive ?
Suppose that [alpha], [beta] and [gamma] are the interior angles of a triangle.
Since f is not a TPF there exists a triangle with interior angles [alpha], [beta] and [gamma] such that f([alpha]), f([beta]) and f([gamma]) will not be the lengths of the sides of any triangle.
Now suppose that [alpha], [beta] and [gamma] are the interior angles of a triangle labeled so that f([alpha]) [greater than or equal to] f([beta]) [greater than or equal to] f([gamma]).
Let [alpha], [beta] and [gamma] be the interior angles of a triangle labeled so that g([alpha]) [greater than or equal to] g([beta]) [greater than or equal to] g([gamma]).

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