How many images of an object are formed when two plane mirrors are inclined to each other facing each other at an angle of `60^(@)` ?

To form three images of an object, the angle at which two plane mirrors should be inclined to each other is

If two plane mirrors are inclined to each other at an angle of 45^@ , find the mumber of images formed.

State the number of images of an object placed between the two plane mirrors, formed in each case when the mirrors are inclined to each other at a. 90^(@) , and b 60^(@)