Thursday, October 2
Space: How do we understand objects in space? Continued..
More on understanding the torus...
Cross sections: circles.... cell mitosis
Fold downs- flattened figures:
Polyhedra and symmetry.
What's at the
Models of platonic solids!
Platonic (regular convex polyhedra) and Archimedean (semiregular convex) Solids-
on the web
The 5 Platonic Solids
Regular polygons around a vertex.
All vertices are "the same"
We worked on the activity in counting vertices, edges, and faces for the platonic solids to become more familiar with them.
The Archimedean Solids:
The 13 Archimedean Solids
Symmetries (Isometries) in the plane compared to those in space- an introduction: Symmetries of the Platonic Solids: Consider the Tetrahedron and the Octohedron
Rotations: Center point(in the plane) - central axis ( in space)
Reflection : across line (in the plane) - across plane (in space)
Symmetries of the cube:
More on The regular and semiregular polyhedra: Check this site! from
Visual geometry pages
Isometries in space: products of reflections in space:
Rotations and translations
Applications to dance