Question

What is the measure of angle B in the triangle?

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m∠B=
°
ABC
A is 40 degrees
B is (2x - 30)
C is (x + 20)

Answer 1

Is the m∠B= ABC then we just plug it in:


m∠B=40+(2x-30)+(x+20)

m∠B=40+2x-30+x+20

m∠B=40+3x-10

m∠B=30+3x

m∠B=3x+30

This is as far as we can simplify it unless we know the value of x.
This means that the answer would be m∠B=3x+30.