Dual uniform polyhedra

Great triakis octahedron

In geometry, the great triakis octahedron is the dual of the stellated truncated hexahedron (U19). It has 24 intersecting isosceles triangle faces. Part of each triangle lies within the solid, hence is invisible in solid models. (Wikipedia).

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Trigonometry for Beginners || Trigonometry Basics

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles. This math video tutorial provides a basic introduction into #trigonometry. It covers trigonometric functions, ratios such as sine, cosine, and tangent, converting polar coordin

From playlist Trigonometry

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Trigonometry 1 Pythagorean Theorem

Discover the Theorem of Pythagoras.

From playlist Trigonometry

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Trigonometry full course for Beginners

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of #triangles. Throughout history, #trigonometry has been applied in areas such as geodesy, surveying, celestial mechanics, and navigation. Trigonometry is known for its many identities, whic

From playlist Trigonometry

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Journée de la Revue d’histoire des mathématiques - Veronica Gavagna - 01/12/17

Journée de la Revue d’histoire des mathématiques (séance préparée par la rédaction de la RHM) Veronica Gavagna (Università degli Studi di Firenze), « Studies on regular polyhedra in the Renaissance: the case of Francesco Maurolico » ---------------------------------- Vous pouvez nous re

From playlist Séminaire d'Histoire des Mathématiques

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Math Mornings at Yale: Asher Auel - Wallpaper, Platonic Solids, and Symmetry

The Platonic solids-the tetrahedron, cube, octahedron, dodecahedron, and icosahedron-are some of the most beautiful and symmetric geometrical objects in 3-dimensional space. Their mysteries started to be unraveled by the ancient Greeks and still fascinate us today. In 1872, the German geom

From playlist Math Mornings at Yale

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Scott Kim - Motley Dissections - G4G13 April 2018

This talk discusses motley dissections — polygons cut into polygons and polyhedra cut into polyhedra such that no two pieces every completely share an edge or a face. The most famous motley dissection is the squared square. My contribution extends this to triangled triangles, pentagoned pe

From playlist G4G13 Videos

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Thin Groups and Applications - Alex Kontorovich

Analysis and Beyond - Celebrating Jean Bourgain's Work and Impact May 21, 2016 More videos on http://video.ias.edu

From playlist Analysis and Beyond

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Q&A - The Wondrous World of Perovskites - with Mike Glazer

Mike Glazer answers questions from the audience following his 2017 Bragg Lecture on Perovskites. Watch the lecture: https://www.youtube.com/watch?v=v9bMEUr2II4 Subscribe for regular science videos: http://bit.ly/RiSubscRibe The crystalline materials known as Perovskites make up 38% of the

From playlist Ri Talks

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Trigonometry 2 The Trigonometric Functions

Meet the 6 main trigonometric functions of right triangles and some of their identities.

From playlist Trigonometry

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Vanessa Robins (11/28/17): Persistence diagrams of bead packings

Uncovering grain-scale mechanisms that underlie the disorder-order transition in assemblies of granular materials is a fundamental problem with technological relevance. To date, the study of granular crystallization has mainly focussed on the symmetry of crystalline patterns while their em

From playlist AATRN 2017

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"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

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Moves 2022 conference talk: Variants of the 15-puzzle and the effects of holonomy

A talk I gave at the 2022 Moves conference in New York City.

From playlist Talks

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g-conjecture - Numberphile

Discussing h-vectors and the g-conjecture. Featuring June Huh from the Institute for Advanced Study at Princeton University. More links & stuff in full description below ↓↓↓ A little extra bit from this interview: https://youtu.be/cFKGX3vAs_Q Shapes in higher dimensions: https://youtu.b

From playlist Fields Medallists on Numberphile

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Trigonometry: What Is It?

This video shows how trigonometry is both interesting and useful. Its history, practical uses, place in mathematics and wide use are all covered. If you are wondering why you might want to learn trigonometry, start here!

From playlist Trigonometry

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The Wondrous World of Perovskites - with Mike Glazer

In the 2017 Bragg Lecture, Mike Glazer unearths the vital world of perovskites, the crystalline materials that make up 38% of the Earth's volume. Q&A: https://www.youtube.com/watch?v=WsPBB6azzX4 Subscribe for regular science videos: http://bit.ly/RiSubscRibe The crystalline materials kno

From playlist Ri Talks

Related pages

Stellated truncated hexahedron | Geometry | Triangle | Dihedral angle