In the diagram above, AB, CD and XY are straight lines intersecting at W. Find ∠CWX
Attached Figure / Diagram
A
20o
B
80o
C
100o
D
120o
E
140o
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
a = 40o (vertical opp. ∠s are equal) b = 60o
a + b + c = 180o (sum of ∠s on a str line)
40o + 60o + c = 180o
C = 180o - 100o
C = 80o
Source: Myschool Past Questions Archive (Record #23828)