## interior angle

- any of the four angles formed on the inside of two straight lines when crossed by a transversal
- the angle formed inside a polygon by two adjacent sides

## interior angle

noun

- Any of the four angles formed between two straight lines intersected by a third straight line.
- An angle formed inside a polygon by two adjacent sides.

**interior angle**

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

## interior angle

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