interior angle
Plural
interior angles
1
an angle formed between two sides of a polygon that lies inside the shape
- Each interior angle of a regular pentagon measures 108 degrees.
- In a triangle, the sum of the interior angles is always 180 degrees.
- The interior angles of a quadrilateral add up to 360 degrees.
- In geometry class, we learned how to measure interior angles using a protractor.
- The interior angles of an octagon sum up to 1080 degrees.
Synonyms: