Calculate the value of Y in the diagram
Attached Figure / Diagram
A
18o
B
42o
C
48o
D
132o
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
x = 180^\circ - 123^\circ = 57^\circ
z = 180^\circ - 105^\circ = 75^\circ
y = 180^\circ - 57^\circ - 75^\circ = 48^\circ
Source: Myschool Past Questions Archive (Record #26391)