What is the least angle of rotation (if possible) for the following figures? regular pentagon, square, rectangle

The least angle of rotation of a shape is the least amount of degrees you can turn it and still have it look the same
Pentagon is 72 because 360 degrees divided by the pentagon’s 5 angles is 72
Square is 90 because 360/4 is 90
Rectangle is 180 because you have to turn it fully upside-down before it looks the same
Hope this helps!