How many images will be formed if three plane mirrors are placed at 60 degrees?

Answer 1

3 images will coincide. 360/x - 1 = the number of images formed, where x is the angle in degrees. For 60 degrees will get 360/60-1 = 5 images for 1 mirror. For 3 mirrors, the total is 15 images. Subtract 3 images that coincide you get a total of 12 images.