None. This is because rotation through 360 degree is equivalent to no rotation at all.
Any shape can.
square
There cannot be such a shape because a triangle is a 2-D shape and the sum of its internal angles in 180 degrees. However, it is possible to have a triangular shape which has three right angles on convex surfaces.
It only has rotional symmetry if it can be rotated around a point less than 360 degrees and staying the same shape like if you rotate a square 90 degrees it will be the same shape as in the beginning.. Kind of confusing
That will depend on the size of the original angle of and what kind of shape it is which has not been given.
It depends on which kind of Polygon your talking about. Like a square is 360 degrees. As long as a shape has no curved or open lines, it's a polygon.
Cube
It has the shape of a lizard
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The shape is your mom :) love you guys
the shape of a meteorites is kind roughly spherical
A triangle is a geometric shape.