Question

Write a list of steps that are needed to find the measure of B

Answer 1

Subtract 113 from 180 to find the complementary angle right next to it... that would give you two angles in the Triangle... then you can add the difference of that with 72 . And then you would again subtract it from 180 cause that's a total of every triangle... so 180-113=67 ; 67+72=139 ; 180-138= 41.. so angle b is 41 degrees