The diagram shows a circle centre O. if <STR = 29 and <RST = 450, calculate the value of <STO
-
A.
12(^o) -
B.
15(^o) -
C.
29(^o) -
D.
34(^o)
Correct Answer: Option A
Explanation
SRT = 180 – (46 + 29) sum of < s in a
= 180 – 75
= 105
SOT = 2 x 46 < at the centre is twice all the circle = 92
RTO = 180 – (96 + 43)
= 41
STO = 41 – 29
= 12(^o)