In the given figure, O is the centre of the circle, BC which is 18 cm is a tangent and AC is a secant, where DC is 12 cm and AD is x cm, what will be the radius of the circle?
1
9√5 cm
2
7√5 cm
3
9√5/2 cm
4
7√5/2 cm
In the given figure, O is the centre of the circle, BC which is 18 cm is a tangent and AC is a secant, where DC is 12 cm and AD is x cm, what will be the radius of the circle?