Question

triangle png What is the angle measure of angle B?

Answer 1

Answer:

$m\angle B = 28^{\circ}$

Step-by-step explanation:

All angles in a triangle must add up to $180^{\circ}$

We can solve for $\angle B$ using this knowledge

$\angle B + 40 + 112 = 180\\\angle B + 152 = 180\\\boxed{\angle B = 28}$

That is the answer

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Answer 2

Since all the angles of a triangle combined equal 180, add the given degrees and did subtract them from 180.

40+112=152
180-152=28
B=28