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) Responses right angles right angles alternate interior angles alternate interior angles vertical angles vertical angles obtuse angles

Answer 1

To prove that the sum of the measures of the interior angles of a triangle is always 180°, we typically use alternate interior angles. When a line is drawn parallel to one side of the triangle, it creates pairs of alternate interior angles with the other two sides of the triangle. This helps in showing that the sum of the angles in the triangle equals 180°.