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What is the measure of ∠B?
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2 votes
What is the measure of ∠B?

What is the measure of ∠B?-example-1
User Cody Bonney
by
3.9k points

1 Answer

4 votes

Answer:

m<B = 60

Explanation:

Exterior angle thm:

3x + 4x = 10x - 45

7x = 10x - 45

7x - 10x = -45

-3x = -45

x = 15

<B:

4x

4(15)

60

User GuillaumeRZ
by
4.6k points
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