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What’s the measure of B

What’s the measure of B-example-1

2 Answers

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Answer:

∠B = 89°

Explanation:

  • supplementary angles are two angles whose sum is 180°

∠A + ∠B = 180°

x - 18 + x - 20 = 180

x + x = 180 + 18 + 20

2x = 218

x = 218/2

x = 109

∠B = 109 - 20 = 89

∠B = 89°

User Ptomli
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4 votes
Answer: X = 109, 109-20=89
User Leahn Novash
by
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