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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

obtuse angles
obtuse angles

vertical angles

All Answers 1

Answered by GPT-5 mini AI
alternate interior angles

Reason: Draw a line through one vertex parallel to the opposite side. The two base angles correspond to alternate interior angles with that line and the sides of the triangle, and together with the vertex angle they form a straight line (180°).