1 / 12

Platonic Solids

Platonic Solids. Mrs. King. Image from: http://www.learner.org/interactives/geometry/platonic.html. What is a Platonic Solid?. A regular, convex polyhedron . A polyhedron is a 3D geometric solid with flat faces and straight edges.

sana
Télécharger la présentation

Platonic Solids

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Platonic Solids Mrs. King Image from: http://www.learner.org/interactives/geometry/platonic.html

  2. What is a Platonic Solid? • A regular, convex polyhedron. • A polyhedron is a 3D geometric solid with flat faces and straight edges. • The faces of a Platonic solid are congruent regular polygons, with the same number of faces meeting at each vertex. • All edges are congruent. • All angles are congruent.

  3. There are only 5 Platonic Solids! Tetrahedron

  4. There are only 5 Platonic Solids! Cube

  5. There are only 5 Platonic Solids! Octahedron

  6. There are only 5 Platonic Solids! Dodecahedron

  7. There are only 5 Platonic Solids! Icosahedron

  8. Tetrahedron Lesson #1

  9. Assemble Your Tetrahedron!

  10. Let’s Explore a Tetrahedron! • http://www.learner.org/interactives/geometry/platonic.html

  11. Fun Facts • The tetrahedron also has a beautiful and unique property ... all four vertices are the same distance from each other! • And it is the only Platonic Solid with no parallel faces. • The plural of tetrahedron is tetrahedra. From: http://www.mathsisfun.com/ geometry/tetrahedron.html

  12. Formulas: • Surface Area: • Volume: • Example: Find the surface area AND volume of a tetrahedron with an edge 3 cm long.

More Related