Question 1152697

Since the plane if cutting through the prism to make {{{5}}} sides, than the original shape needs to have less than {{{5}}}.
 A prism, is a 3D shape, so you can't have a {{{2}}} sided shape.

Now you have a choice of {{{3 }}}or {{{4}}} sides.

A {{{3}}} sides shape is a {{{triangle}}}, which also can't be cut into a {{{5}}} sided prism, so the answer would need to be {{{4}}}.