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Based on theCongruent Supplements Theorem, <1 = <3 arecongruent, given that <1 and <2 and <2 and <3 aresupplements.What does the Congruent Supplements Theorem say?TheCongruent Supplements Theoremshows that when two angles are considered to besupplementsof a certain angle, then those two angles must becongruent.Filling in thechartwould therefore be:<1 and <2 aresupplementary <1 = <3GIVENCongruent Supplements Theorem<2 and <3 aresupplementaryGIVENFind out more on theCongruent Supplements Theorematbrainly.com/question/17385360.#SPJ1...