Figures that are based on plane geometry have __________ dimensions.

• Plane geometry is based on two-dimensional Euclidean geometry, while solid geometry is based on three-dimensional Euclidean geometry.
• For example, a square is based on plane geometry and has two dimensions - length and breadth whereas a cube is based on solid geometry and has three dimensions- length breadth and height.

Therefore, we can say that figures that are based on plane geometry have two dimensions.