Which relationship describes angles 1 and 2?

1.supplementary angles
2.supplementary angles
3.vertical angles
4.complementary angles

Step-by-step explanation:

Supplementary angles is when either of two angles whose sum is 180°.  Vertical angles are straight up. Complementary angles are either of two angles whose sum is 90°.  therefore 1 and 2 are complementary.

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

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