In the diagram above, O is the centre of the circle, If < UOT = 70o and < RST = 100o. Calculate < RUO
- 20o
-
25o
- 50o
- 80o
The correct answer is: B
Explanation
< OUT = < OTU< OUT = \(\frac{180^o - 70^o}{2} = \frac{110^o}{2} = 55^o\)
< RUT = 180o - 100o = 80o
< RUO = < RUT - < OUT
= 80o - 55o
= 25o