Question

1. in this polygon, which angle is an exterior angle? options: a°, c°, b°, d°

Explanation:

An exterior angle of a polygon is formed by one side of the polygon and the extension of an adjacent side, lying outside the polygon. $a^\circ$ is outside but not formed by a side extension; the unlabeled corner angle is an interior angle; $c^\circ$ is an interior angle. Only $d^\circ$ is formed by a side of the polygon and the extension of an adjacent side, lying outside the polygon.

Answer:

d°