This uniform polyhedron compound is a composition of 2 great dodecahedra, in the same arrangement as in the compound of 2 icosahedra. It is one of only five polyhedral compounds (along with the compound of six tetrahedra, the compound of five great dodecahedra, the compound of two small stellated dodecahedra, and the compound of five small stellated dodecahedra) which is vertex-transitive and face-transitive but not edge-transitive. (Wikipedia).
A 10' overview of the LHC project and its research plans
From playlist The Large Hadron Collider
Using a set of points determine if the figure is a parallelogram using the midpoint formula
👉 Learn how to determine the figure given four points. A quadrilateral is a polygon with four sides. Some of the types of quadrilaterals are: parallelogram, square, rectangle, rhombus, kite, trapezoid, etc. Each of the types of quadrilateral has its properties. Given four points that repr
From playlist Quadrilaterals on a Coordinate Plane
Coordination Compounds: Geometry and Nomenclature
We have been learning a lot about a wide variety of compounds, but we haven't really looked much at the transition metals. These also form compounds called coordination compounds, and the types of bonds involved in these compounds is quite a bit different from what we are used to, as are t
From playlist General Chemistry
(New Version Available) Compound Inequalities
New version: https://youtu.be/U20Dp4lPVoo http://mathispower4u.wordpress.com/
From playlist Linear and Absolute Value Inequalities
Covalent Compounds: Writing Chemical Names and Formulas
How to write the chemical names and formulas for covalent compounds. You can see a listing of all my videos at my website, http://www.stepbystepscience.com
From playlist Chemical Equations; Ionic and Covalent Compounds
Determine if a set of points makes up a rectangle using the distance formula
👉 Learn how to determine the figure given four points. A quadrilateral is a polygon with four sides. Some of the types of quadrilaterals are: parallelogram, square, rectangle, rhombus, kite, trapezoid, etc. Each of the types of quadrilateral has its properties. Given four points that repr
From playlist Quadrilaterals on a Coordinate Plane
Ionic Compounds: Writing Chemical Names
How to write chemical names for ionic compounds You can see a listing of all my videos at my website, http://www.stepbystepscience.com
From playlist Chemical Equations; Ionic and Covalent Compounds
"Illustrating Geometry" exhibition at SCGP, Artist's talk: "Sculpture in four-dimensions"
Slides: http://www.math.okstate.edu/~segerman/talks/sculpture_in_4-dimensions.pdf This video is also available at the Simons Center website, at http://scgp.stonybrook.edu/archives/11540 Thanks to Josh Klein for filming and editing.
From playlist 3D printing
2014 Hari Shankar Memorial lecture: "How to make sculptures of 4-dimensional things"
The Hari Shankar Memorial Lecture is an annual public lecture held at the University of Northern Iowa. Slides: https://www.math.okstate.edu/~segerman/talks/how_to_make_sculptures_of_4d_things.pdf
From playlist 3D printing
Henry Segerman - 3D Shadows: Casting Light on the Fourth Dimension - 02/11/17
Henry Segerman "3D Shadows: Casting Light on the Fourth Dimension" February 11, 2017 Wesier Hall Ann Arbor, Michigan
From playlist 3D printing
Determining if a set of points makes a parallelogram or not
👉 Learn how to determine the figure given four points. A quadrilateral is a polygon with four sides. Some of the types of quadrilaterals are: parallelogram, square, rectangle, rhombus, kite, trapezoid, etc. Each of the types of quadrilateral has its properties. Given four points that repr
From playlist Quadrilaterals on a Coordinate Plane
Rhombofoam in Zome – Scott Vorthmann
Rhombofoam is a pattern that fills 3D space in all the ways that a golden rhombohedron does, while forming dodecahedral and 16-sided cells that have the topology of foam: three cells around each edge, and four around each vertex. The result is a foam model that has the symmetries of a quas
From playlist G4G12 Videos
This shows a 3d print of a puzzle I produced using shapeways.com. This is joint work with Saul Schleimer. This is available at http://shpws.me/lmxi. A larger version of the puzzle is available at http://shpws.me/lmxi.
From playlist 3D printing
How to determine the perimeter of a quadrilateral using distance formula of four points
👉 Learn how to determine the figure given four points. A quadrilateral is a polygon with four sides. Some of the types of quadrilaterals are: parallelogram, square, rectangle, rhombus, kite, trapezoid, etc. Each of the types of quadrilateral has its properties. Given four points that repr
From playlist Quadrilaterals on a Coordinate Plane
This shows two 3d prints of mathematical sculptures I produced using shapeways.com. These are joint work with Saul Schleimer. These models are available at http://shpws.me/bGjW and http://shpws.me/bGko
From playlist 3D printing
MOVES 2013 talk: "Puzzling the 120-cell"
This is a talk I gave at the MOVES conference on recreational mathematics (moves.momath.org), on 28th July 2013, about my work with Saul Schleimer making a family of burr puzzles we call "Quintessence". The slides are a little difficult to see on the video, but you can download them at htt
From playlist Talks
A space-filling polyhedron, based on the Weaire-Phelan foam
The Weaire-Phelan foam is a relaxation of a packing of irregular dodecahedra and tetrakaidecahedra. Dissect the dodecahedra into pentagon-based pyramids by adding a vertex at the center, then glue their bases to the surrounding tetrakaidecahedra. Amazingly the faces line up and the result
From playlist Geometry
These sculptures are joint work with Roice Nelson. They are available from shapeways.com at http://shpws.me/oNgi, http://shpws.me/oqOx and http://shpws.me/orB8.
From playlist 3D printing
What Is An Atom - Part 1 | Properties of Matter | Chemistry | FuseSchool
What Is An Atom - Part 1 | Properties of Matter | Chemistry | FuseSchool Learn the basics about the atom, whilst learning about properties of matter. Atoms are the small bits that make up all the matter in the world around us. There are around one hundred different sorts of atom, from th
From playlist CHEMISTRY
