In the figure, PS = SR and Rx is a tangent to the circle at R, < QRX is equal to 72o. Find angle SPR
- 20o
-
36o
- 72o
- 30o
- 15o
The correct answer is: B
Explanation
XRQ = RSQ (Alternate segment)
s = 72o
(80o - 72o = 180o)
a + b + c = 180o = 2b + c = 180o
2b + 108 = 180o
2b = 72o
b = 36o