I cannot think of any 2-d shape. The 3-d shape with four faces is a tetrahedron.
Squares and rectangles have a two-dimensional shape with four sides and four right angles.
a rhombus or a parallelogram
A Diamond
How about a triangle which is a 2 dimensional shape with 3 sides
A polygon is any geometric 2-D shape. A Quadrilateral is a polygon with four sides.
A quadrilateral is a 2D shape that has 4 sides
A 2-D shape with seven sides is called a HEPTAGON.
A dodecagon has 12 sides.
-2
a pentagon
Hexagon