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Rudiy27
3 years ago
13

4. Angles C and D are supplementary angles

SAT
1 answer:
natita [175]3 years ago
8 0

Answer:

∠C = 159°

∠D = 21°

Explanation:

∠C + ∠D = 180 (1)

∠C = 33 + 6∠D (2)

Substituting (2) to (1):

180 = 33 + 6∠D + ∠D

= 33 + 7∠D

180 - 33 = 7∠D

147 = 7∠D

<u>21 = ∠D</u>

If ∠D = 21,

∠C + 21 = 180

∠C = 180 - 21

<u>∠</u><u>C</u><u> </u><u>=</u><u> </u><u>159</u>

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