What type of angles are used to help prove that the sum of the measures of the interior angles of a triangle is always 180°? (1 point)

• obtuse angles
• vertical angles
• alternate interior angles
• right angles

1 answer

To help prove that the sum of the measures of the interior angles of a triangle is always 180°, vertical angles and alternate interior angles are commonly used. However, the most straightforward approach typically involves the use of alternative interior angles.

Therefore, the correct answer is: • alternate interior angles