a square...it's a cube that is 3-d square
A quadrilateral is a 2D shape that has 4 sides
I cannot think of any 2-d shape. The 3-d shape with four faces is a tetrahedron.
A 2-D shape with seven sides is called a HEPTAGON.
A dodecagon has 12 sides.
No, it is a 3-d shape. A circle is a 2-d shape.