Question

1. the exterior angle theorem states that the exterior angle of a triangle is equal to... 180 the sum of the two interior angles the sum of the two other exterior angles

Explanation:

The exterior angle theorem in geometry states that an exterior angle of a triangle is equal to the sum of the two non - adjacent (interior) angles. 180 is related to the sum of angles in a triangle (\(180^{\circ}\) for the sum of interior angles), but that's not what the exterior angle theorem is about. And the sum of two other exterior angles is not relevant to the exterior angle theorem.

Answer:

the sum of the two interior angles