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8 of 158 of 15 Items Question 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 alternate interior angles alternate interior angles right angles right angles vertical angles vertical angles Skip to navigation page 1 of 1

Answer 1

To prove that the sum of the measures of the interior angles of a triangle is always 180°, the type of angles used are alternate interior angles.

In a typical proof, you would draw a parallel line through one vertex of the triangle and use the concept of alternate interior angles formed with the other two sides of the triangle, which helps show that the sum of the interior angles is equal to 180 degrees.