A face
cube There are a great many solid shapes that have only flat surfaces.
rectangle, cylinder
Plane Geometry (is about flat shapes like lines, circles and triangles ... shapes that can be drawn on a piece of paper) Solid Geometry (is about three dimensional objects like cubes and pyramids).
Polygons are flat shapes
A face
Mondrian
Identify shapes of common objects. Identify faces, vertices, and edges of solid shapes; sort solid objects by faces, edges, and vertices. Relate solid shapes and plane shapes. Identify and count vertices and sides of shapes. Use shapes, such as pattern blocks, to make new shapes. Identify the movement of a shape as a slide, flip, or turn. Recognize and draw congruent figures
A sphere has a surface but no flat face.
Yes, plane figures are flat, not 3-dimensional shapes.
a net is what you get when you unfold a geometric shape into a 2-d flat surface
sphere
Plane figures are flat (2-dimensional) shapes.
Polyhedron is a geometric solid in three dimensions with flat faces and straight edges.
Faces on solid figures are like when you look at a square you see a flat wall type surface.
Jacob Lawrence
A 2d shape is a flat object (ex: square, circle, etc.) and a 3d shape is a shape in space (ex: cube, sphere, etc.)