From the given figure, the volume of x is___
True
False
85∘
100∘
The sum of extericer angles of a quadrilateral =360∘
∴90+65+125+x=360∘
x=360∘−280∘
x=80∘
Hence (B)
In the given figure, $O$ is the centre of a circle. If ∠AOB=100∘ and ∠AOC=90∘ , then ∠BAC=?
(a) 85∘
(b) 80∘
(c) 95∘
(d) 75∘