don steward
mathematics teaching 10 ~ 16

Sunday, 29 April 2018

3D geometry: platonic solids

platonic solids have the same regular polygons for all of the faces
it is possible to consider the options for how regular polygons can meet at a vertex to establish that there are only 5 platonic solids

powerpoint: platonic solids

it can be interesting to look at how edges join for the platonic solids
powerpoint: platonic solid nets

one interesting way to represent a solid is by means of a Schlegel diagram
powerpoint: Schlegel diagrams and hexahedrons

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