Mathematics, 19.12.2020 01:00, dansuba

Really, really need help ASAP. Prove that the sum of the measures of the interior angles of a triangle is 180°. Be sure to create and name the appropriate geometric figures.
I've seen examples but I don't understand it or the answer.

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Really, really need help ASAP. Prove that the sum of the measures of the interior angles of a trian...