MATH

• Polyhedron


  A three-dimensional figure with flat surfaces, straight edges, and vertices. The surfaces or faces of a polyhedron have to be polygons.
• Polygon


  • A plane figure that is closed and has straight sides made of line segments.
• Polygons


  • Triangle
  • Quadrilateral (rectangle)
  • Octagon
• Non-polygons


  • Circle
  • Open figure
  • Cube
• Polyhedron


  A three-dimensional figure where all the surfaces or faces are polygons.
• Polyhedra


  • Cube (faces are squares)
  • Square pyramid (base is square, other faces are triangles)
  • Hexagonal prism (two hexagon faces, other faces are rectangles)
• Non-polyhedra


  • Cylinder
  • Cone
  • Sphere