3D Shapes_1

3D Shapes_1

1. Solids

   • Non-Polyhedron-Curved sides
     • Cones-Circular base comes to point
       • Right Cone
         • Apex directly above its base
       • Right Circular Cone
         • Similar to a pyramid but has a circular base
     • Spheres-No edges or apex
       • Hemisphere
         • Half a Sphere
     • Cylinders- Straight parallel lines, circular top & base
     • Truncate- Shape is cut at top parallel to base
     • Oblique- Shape is cut at a slant not parallel
   • Polyhedron-Polygons as faces & no curved faces
     • Regular
       • Platonic Solids- All faces and angles the same
         • Tetrahedron- 4 Triangles
         • Hexahedron-6 Squares
         • Octahedron- 8 Triangles
         • Dodecahedron- 12 Pentagons
         • Icosahedron-20 Triangles
     • Irregular
       • Prism-Identical ends and flat surfacse
         • Regular- Regular Polygon base
         • Irregular- Irregular polygon base
       • Pyramid- All edges come to a point called an apex
         • Regular- Triangle base
         • Irregular- Rectangle or square based
     • Truncate- Shape is cut at top parallel to base
     • Oblique- Shape is cut at a slant not parallel