Fill in the justifying statements to support the proof of Theorem 6-2: If two angles are supplementary to the same angle, then they are congruent. Given: \angle∠ 1 is supplementary to \angle∠ 2.angle∠ 3 is supplementary to \angle∠ 2.Prove: angle∠ 1 \cong≅ \angle∠ 3

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“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .

B. because the 7 represents "seven times", x represents "a number", 12 represents "plus twelve", and -4 represents "minus four"