Question : What is the number of common tangents that can be drawn to two circles that touch each other externally?

Question : The diameters of the two circles are 12 cm and 20 cm, respectively and the distance between their centres is 16 cm. Find the number of common tangents to the circles.

Question : Three circles of radius 6 cm each touch each other externally. Then the distance of the centre of one circle from the line joining the centres of the other two circles is equal to:

Question : Two circles touch each other externally at P. AB is a direct common tangent to the two circles, A and B are points of contact, and $\angle$PAB = 35°, then $\angle$ABP is:

Question : Two equal circles of radius 18 cm intersect each other, such that each passes through the centre of the other. The length of the common chord is ______.