Mathematics

In the diagram above, PQ//RS. The size of the angle marked x is

In the diagram above, PQ//RS. The size of the angle marked x is

  • A.
    100o
  • B.
    80o
  • C.
    50o
  • D.
    30o
Correct Answer: Option B
Explanation

Exterior angle = sum of two interior opposite angles
y = 50° (vert. opp ∠s are equal)
X = y + 30
X = 50 + 30
X = 80°