Question

Refer to the attachment. Answer with explaination.​

Answer 1

Answer:

D.) 57 degree

Step-by-step explanation:

angle x + angle(BAC) = 180

123 + angle(BAC) = 180

angle(BAC) = 180 - 123

angle (BAC) = 57

angle(BAC) = angle(BCA) [isosceles triangle]

angle(BCA) = y [vertically opposite angle]

y = 57 degree