Interior Angle

An interior angle is an angle formed inside a polygon at one of its vertices, bounded by two adjacent sides of the shape.

Example

In a triangle (a 3-sided polygon), the sum of the three interior angles is always $180^\circ$. If a triangle has angles $A$, $B$, and $C$, then $A + B + C = 180^\circ$.

Interior Angle

Example

See Also