Tetrahedral symmetry

Regular polyhedra

This shows a 3d print of a mathematical sculpture I produced using shapeways.com. This model is available at http://shpws.me/q0PF.

From playlist 3D printing

How to construct a Tetrahedron

How the greeks constructed the first platonic solid: the regular tetrahedron. Source: Euclids Elements Book 13, Proposition 13. In geometry, a tetrahedron also known as a triangular pyramid, is a polyhedron composed of four triangular faces, six straight edges, and four vertex corners. Th

From playlist Platonic Solids

Chemistry - Molecular Structure (4.5 of 45) Basic Shapes - Tetrahedral Molecules

Visit http://ilectureonline.com for more math and science lectures! In this video I will introduce the basic tetrahedral molecules of the molecular structure.

From playlist CHEMISTRY 14 MOLECULAR STRUCTURE

Teach Astronomy - Symmetry

http://www.teachastronomy.com/ A lot of fundamental concepts in physics are based on the idea of symmetry. Symmetry is familiar to us in an aesthetic sense. It often means things that have pleasing proportion, or look the same from every direction, or have a harmonious nature about them.

From playlist 23. The Big Bang, Inflation, and General Cosmology 2

Canonical structures inside the Platonic solids I | Universal Hyperbolic Geometry 49 | NJ Wildberger

Each of the Platonic solids contains somewhat surprising addition structures that shed light on the symmetries of the object. Here we look at the tetrahedron, and investigate a remarkable three-fold symmetry which is contained inside the obvious four-fold symmetry of the object. We connect

From playlist Universal Hyperbolic Geometry

Simon Bexfield - Tetrahedrons Made Simple - G4G12 Apr 2016

From playlist G4G12 Videos

Mod-02 Lec-04 Crystal Structure (Contd.)

Advanced ceramics for strategic applications by Prof. H.S. Maiti,Department of Metallurgy and Material Science,IIT Kharagpur.For more details on NPTEL visit http://nptel.ac.in

From playlist IIT Kharagpur: Advanced Ceramics for Strategic Applications | CosmoLearning.org Materials Science

Mod-02 Lec-03 Crystal Structure

Advanced ceramics for strategic applications by Prof. H.S. Maiti,Department of Metallurgy and Material Science,IIT Kharagpur.For more details on NPTEL visit http://nptel.ac.in

From playlist IIT Kharagpur: Advanced Ceramics for Strategic Applications | CosmoLearning.org Materials Science

Mod-02 Lec-05 Crystal Structure (Contd. )

Advanced ceramics for strategic applications by Prof. H.S. Maiti,Department of Metallurgy and Material Science,IIT Kharagpur.For more details on NPTEL visit http://nptel.ac.in

From playlist IIT Kharagpur: Advanced Ceramics for Strategic Applications | CosmoLearning.org Materials Science

Chemistry 51A: Organic Chemistry. Lecture 16

UCI Chem 51A Organic Chemistry (Fall 2014) Lec 16. Organic Chemistry -- Stereochemistry View the complete course: http://ocw.uci.edu/courses/chem_51a_organic_chemistry.html Instructor: Susan King, Ph.D. License: Creative Commons BY-NC-SA Terms of Use: http://ocw.uci.edu/info. More course

From playlist Chem 51A: Week 6

Tetrahedral racks

This is joint work with Saul Schleimer. Order from Shapeways: http://shpws.me/MCng, http://shpws.me/MCnf Download from Thingiverse: http://www.thingiverse.com/thing:1739545

From playlist 3D printing

Chemistry - Molecular Structure (4 of 45) Basic Shapes - Tetrahedral Molecules

Visit http://ilectureonline.com for more math and science lectures! In this video I will introduce the basic tetrahedral molecules of the molecular structure.

From playlist CHEMISTRY 14 MOLECULAR STRUCTURE

Chemistry 107. Inorganic Chemistry. Lecture 02

UCI Chemistry: Inorganic Chemistry (Fall 2014) Lec 02. Inorganic Chemistry -- Symmetry and Point Groups View the complete course: http://ocw.uci.edu/courses/chem_107_inorganic_chemistry.html Instructor: Matthew D. Law License: Creative Commons CC-BY-SA Terms of Use: http://ocw.uci.edu/inf

From playlist Chem 107: Week 1

What is Symmetry? (Nina Qiu)

This video was produced by Nina Qiu of Year 10 (2015).

From playlist Random

Electron Geometry, Molecular Geometry & Polarity

In this live tutoring session I focused on electron geometry, molecular geometry & polarity. Enjoy! 📗 FREE CHEMISTRY SURVIVAL GUIDE https://melissa.help/freechemguide 👉 SHOP MY CHEMISTRY RESOURCES 👈 https://melissamaribel.com/ -Naming Compounds Flashcards https://melissa.help/namingflas

From playlist Live Chemistry Tutoring

The geometry of the regular tetrahedron | Universal Hyperbolic Geometry 45 | NJ Wildberger

We look at the geometry of the regular tetrahedron, from the point of view of rational trigonometry. In particular we re-evaluate an important angle for chemists formed by the bonds in a methane molecule, and obtain an interesting rational spread instead. Video Content: 00:00 Introduction

From playlist Universal Hyperbolic Geometry

Five axis racks

Thanks to John and Jane Kosticks (http://www.kosticks.com) for telling me about the geometry this is based on. Five racks, each with two beams, slide through each other. In Thurston-Conway orbifold notation, this has symmetry type 5x. Available at http://shpws.me/QGcX.

From playlist 3D printing

Mod-15 Lec-36 Magnetic Ceramics (Contd. )

Advanced ceramics for strategic applications by Prof. H.S. Maiti,Department of Metallurgy and Material Science,IIT Kharagpur.For more details on NPTEL visit http://nptel.ac.in

From playlist IIT Kharagpur: Advanced Ceramics for Strategic Applications | CosmoLearning.org Materials Science

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

Unique way to divide a tetrahedron in half

This is an interesting geometry volume problem using tetrahedrons. We use the volume of a tetrahedron and Cavalieri's principle in 3D.

From playlist Platonic Solids