In the diagram above, PQ//RS. The size of the angle marked x is
- A.
100^{o} - B.
80^{o} - C.
50^{o} - D.
30^{o}
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°