Mathematics

In the diagram above, AB, CD and XY are straight lines intersecting at W. Find…

In the diagram above, AB, CD and XY are straight lines intersecting at W. Find ∠CWX
  • A.
    20o
  • B.
    80o
  • C.
    100o
  • D.
    120o
  • E.
    140o
Correct Answer: Option B
Explanation

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