These are flat and can be drawn on paper.

Triangle: A shape with 3 sides and 3 angles.

Types: Equilateral (all sides equal), Isosceles (2 sides equal), Scalene (no equal sides)

Square: 4 equal sides and all angles are 90°

Rectangle: Opposite sides equal, and all angles are 90°

Circle: A round shape with no corners or edges. Every point on the edge is the same distance from the center.