UNIT 7

UNIT 7

1. 2.2.1 Three-Dimensional forms

   • width
   • height
   • depth

2. Polyhedra and Platonic Solids

   • Solids have properties
     • Volume
     • surface area
     • how many vertices
   • The sides of a polyhedron are called faces, the lines where faces meet are called edges, and the corners where edges meet are called vertices.
   • Tetrahedron: A 4-faced / Hexahedron or cube: A 6-faced / Octahedron: An 8-faced / Dodecahedron: A 12-faced / Icosahedron: A 20-faced

3. Non Polyhedra

   • Sphere: • It has no edges or vertices (corners) • It has one Surface
   • Cylinder • It has a flat base and aflat top • The base is the same as the top • From base to top the shape stays the same • It has one curved side
   • Cone • It has one curved side • The pointy end of a cone is called the apex • The flat part is the base
   • Torus • it can be made by revolving a small circle (radius r) along a line made by a bigger circle (radius R). • It has no edges or vertices

Imágenes y archivos del mapa