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mina [271]
3 years ago
8

8

Mathematics
1 answer:
erastova [34]3 years ago
8 0

Answer/Step-by-step explanation:

8. m<DEF = 122°

m<FEG + m<DEF = 180° (Angles on a straight line)

m<FEG + 122 = 180 (Substitution)

m<FEG = 180 - 122

m<FEG = 58°

9. m<BOC = 27°

m<AOC = 47°

m<AOB + m<BOC = m<AOC (angle addition postulate)

m<AOB + 27 = 47 (substitution)

m<AOB = 47 - 27 (Subtraction property of equality)

m<AOB = 20°

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