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3 years ago

SOMEONE HELP! I know the answer I just need to show the work.

Mathematics

1 answer:

gayaneshka [121]3 years ago

6 0

okay so

117° + angle a = 180° (supplementary angle)

angle a = 180 - 117

= 63°

then angle a + angle b + 81° = 180° ( angle sum property)

so... 63° + angle b + 81° = 180

144 + angle b = 180°

angle b = 180 - 144

= 36°

hope this helps.

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3 years ago

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3 years ago

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The decrease is 8.7%

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2 years ago