The Triangle Angle Sum Theorem states that the sum of the angles in a triangle is always 180 degrees. This theorem helps prove the AAS (Angle-Angle-Side) congruence criterion by establishing that when two angles and a non-included side of one triangle are equal to two angles and the corresponding non-included side of another triangle, the third angles must also be equal, confirming that the two triangles are congruent.
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In 1–2 sentences, explain how the Triangle Angle Sum Theorem helps prove AAS congruence.(2 points)
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