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Surface Area and Nets. Polyhedron. Polyhedron: a 3-dimensional object, or solid, whose faces are polygons. Polyhedron. Parts of Polyhedrons. Face: a flat surface on a solid Edge: segments joining faces together Vertex: corner; the point where 3 or more faces meet. Prism.

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polyhedron
Polyhedron
  • Polyhedron: a 3-dimensional object, or solid, whose faces are polygons
parts of polyhedrons
Parts of Polyhedrons
  • Face: a flat surface on a solid
  • Edge: segments joining faces together
  • Vertex: corner; the point where 3 or more faces meet
prism
Prism
  • Prism: a polyhedron whose bases are congruent and parallel
  • Prisms are named for the shape of their bases.
pyramid
Pyramid
  • Pyramid: a polyhedron that has a polygonal base but comes to a point
pyramid1
Pyramid
  • Pyramids are named after the shape of their base
slide8
Nets
  • Net: a flat figure that can be folded to form a closed three-dimensional object (solid).
  • We can use nets to help figure out the surface area of a solid shape
  • http://www.learner.org/interactives/geometry/area_surface.html
slide9
Nets
  • Rectangular Prism
slide10
Nets
  • Triangular Prism
slide11
Nets
  • Square Pyramid
surface area
Surface Area
  • Surface Area: the sum of the areas of all the faces of a 3D figure
  • To find the surface area of any shape, you can follow the process described below:
      • Draw a net of the polyhedron.
      • Calculate the area of each face.
      • Add up the area of all the faces.
sources
Sources
  • Most of the information and some of the pictures on these slides comes from mathisfun.com
  • Some information comes from the textbook: Middle School Math by Scott Foresman—Addison Wesley Course 2, 1998
  • Some drawings come from various locations on the web
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