Question

Given that ABC XYZ, mA = 40, and mC = 55, find mY.

Answer 1

can you drawing it ?

Answer 2

mA+mB+mC=180
mA=40
mC=55
mA+mC=95 so mB = 180-95=85
mB=85

ABC
XYZ

so than you see to angle A satisfied angle X and to angle B satisfied angle Y and to angle C
satisfied angle Z

so than to angle Y satisfied angle B this mean that angle Y has measure equal with measure of angle B what mean that mY=mB=85

hope this is understandably sure right easy