From the figure above, what is the value of p?
Attached Figure / Diagram
A
135o
B
90o
C
60o
D
45o
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
In the figure above, qo = 30o (vertically opposite angles)
(P + 2q)o + 30o = 180o(angles on a straight line)
p + 2 x 30o + 30o = 180o
p + 60o + 30o = 180o
p + 90o = 180o
p = 180o - 90o
= 90o
Source: Myschool Past Questions Archive (Record #33158)