NumberNut
Number Nut: Shapes, Symbols, and Colors: 3 D Shapes
This lesson describes three dimensional shapes and provides two interactive practice activities.
Other
Platonic Realms: The Irrationality of the Square Root of Two
An informative resource on the nature of Platonic Solids and what constitutes these figures.
Other
Polyhedra: The Five Platonic Solids
A brief site that includes some activities to understand the figures.
Other
Personal Site: Pyramids, Dipyramids, and Trapexohedra
This site is a personal site that discusses the popular polyhedron, the pyramid. It explains that by joining two pyramids you will get a dipyramid.
National Council of Teachers of Mathematics
The Math Forum: Polyhedra Nets Paper
Contains six examples of polyhedra nets (cube, tetrahedron, octahedron, dodecahedron, icosahedron, cubosctahedron).
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Polyhedra
Find a quick, concise explanation of what a polyhedra is. Examples are given and clearly explained.
Math Is Fun
Math Is Fun: Polyhedron
Students learn about the terminology and formulas associated with polyhedrons. The learning resource consists of definitions, images, and examples.
University of Cambridge
University of Cambridge: Nrich: Skeleton Shapes
At this one page website a variety of polyhedra are shown. The challenge is to create the skeleton for each polyhedron and identify the needed materials. You can check your solution right at the website.
University of Cambridge
University of Cambridge: Nrich: A Chain of Eight Polyhedra
Eight different polyhedra are given along with a challenge in this game. Can you arrange them so that their faces match in a chain? A solution is available to check your answers.
University of Cambridge
University of Cambridge: Nrich: Building With Solid Shapes
Predict which solid shape constructions would be unstable as shown at this one page website. Solutions are available right at the website.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Stellated Dodecahedron
This question and answer site provides information about stellated dodecahedrons, as well as several internet links to this topic.
University of Georgia
University of Georgia: Inter Math: Polyhedron
The polyhedron is defined and illustrated. Links provided for related terms, everyday examples, challenging problems, more information. There is also an interactive checkpoint involving polyhedrons.
Wolfram Research
Wolfram Alpha: Tetrahedron Vertices
The animation investigates the vertices of a tetrahedron.
Wolfram Research
Wolfram Math World: Net
Here you can find a definition for the mathmatical term 'net', in addition to a couple of examples.
Curated OER
Polyhedra: The Five Platonic Solids
A brief site that includes some activities to understand the figures.
Curated OER
Virtual Polyhedra: Polyhedra Names
An extensive look at the naming of various polyhedral shapes. Many hyperlinks for more information.
Curated OER
Personal Site: Pyramids, Dipyramids, and Trapexohedra
This site is a personal site that discusses the popular polyhedron, the pyramid. It explains that by joining two pyramids you will get a dipyramid.
Curated OER
Personal Site: Pyramids, Dipyramids, and Trapexohedra
This site is a personal site that discusses the popular polyhedron, the pyramid. It explains that by joining two pyramids you will get a dipyramid.