These are 2-dimenstional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect).

Ans is Polygons; although the complete definition includes the additional requirement of "a closed figure made of straight lines that do not intersect."

Hey there,

Your question states: These are 2-dimensional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect).

The correct answer would be Polygon. Polygons are the shapes with a 2-dimensional shapes, and has straight lines.

~Jurgen