PQRS is a cyclic quadrilateral. If ∠QPS = 75°, what is the size of ∠QRS?
A.
180o
B.
150o
C.
105o
D.
75o
Correct answer is C
< QPS = 75°
< QRS = 180° - 75° = 105° (opposite angles of a cyclic quadrilateral)