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What is the measure of ∠B?
Triangle A B C with ray A G through point C and angle measures A = 3x, B = 4x, and exterior angle B C G = 10x minus 45.




60∘60 degrees

15∘15 degrees

45∘45 degrees

105∘

What is the measure of B Triangle A B C with ray A G through point C and angle measures A 3x B 4x and exterior angle B C G 10x minus 45 6060 degrees 1515 degree class=

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msm555

Answer:

Solution given:

4x+3x=10x-45[exterior angle is equal to the sum of two opposite interior angle]

45=10x-7x

x=45/3

x=15

now.

<B=4x=4×15=60° is your answer

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