In fig 7, two equals circles, with centres O and O', touch each other at X. OO' produced meets the circle with centre O' at A. Ac is tangent to the circle with centre O, at the point C. O'D is perpendicular to AC. Find the value of `(DO')/(CO).

. In the given figure, two equal circles, with centres O and O', touch each other at X. OO' produced me the circle with centre O' at A. AC is tangent to the circle with centreO, at the point C. O'D is perpendicular to AC. Find the value of (DO')/(CO).

AC is tangent to O,O'D is perp to AC,Find the value of (DO)/(CO)

In the figure, two circles with centers O and P intersect each other at points D and C. Line AB intersects the circle with centre O at points A and B and touches the circle with centre P at point E. Prove /_ADE+/_BCE=180^(@) .

If O is the centre of the circle, then x is

If Fig , AOB is diameter of a circle with centre O and AC is a tangent to the circle at A . If angle BOC = 130^@ , then find angleACO .