In the diagram above, calculate the value of x
- A. 60o
- B. 100o
- C. 120o
- D. 140o
Correct Answer: Option C
Explanation
p + 40o = 100o (exterior ∠ = sum of two interior opp ∠s)
p = 100o – 40o
P = 60o
But q + p = 180o (∠s on a straight line)
q + 60o
q = 180o – 60o
q = 120o
x = q (corresponding ∠)
∴x = 120o