In the diagram above, PQ is parallel to RS. What is the value of α + β + γ?
Attached Figure / Diagram
A
360o
B
200o
C
180o
D
90o
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
γ + S = 180(Allied angles)
S = 180 - γ
α + P = 180(Allied angles)
p = 180 - α
β = P + S
β = 180 - α + 180 - γ
β = 360 - α - γ
β + α + γ = 360
Source: Myschool Past Questions Archive (Record #11106)