You can't have a one-sided shape, or even a 2 sided shape. If it's a shape, then it needs to: 1) Be made of only straight lines. NO CURVES! 2) Be closed in by the lines. NO OPENINGS!
So I'll start at 3: 3 Sided: Triangle 4 Sided: Quadrilateral 5 Sided: Pentagon 6 Sided: Hexagon 7 Sided: Heptagon Don't forget to rate this answer the Brainliest!
