Cut out a regular tetrahedron from a cube.. Cut out a regular tetrahedron from a cube.

Tags: Cut out a regular tetrahedron from a cube.

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....

From njwildberger

Paper pyramids that form a cube: - Three pyramids - Five triangular pyramids - Five square pyramids - Six square pyramids - Six triangular pyramids Templates (nets): - http://www.korthalsaltes.com/model.php?name_en=three%20pyramids%20that%20form%20a%20cu...

From paper polyhedra

Starting with a plain piece of A4, create a regular tetrahedron (triangular based pyramid) a perfect building block for dozens of maths workshops and even shows! www.bubblymaths.co.uk It is the the first thing you need to make a Sierpinski tetrahedron. ...

From Bubbly Maths

There are many relationships between three of the Platonic solids: cube, tetrahedron, and octahedron. This video shows how you can start with a cube in Google SketchUp, and end up with tetrahedrons and an octahedron. Only a few simple tools are required f...

From bonnie roskes

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/basic-geometry/cross-sections/e/cross-sections-of-3d-shapes?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson: https://www.khan...

From Khan Academy

This is basically a visual proof of why a pyramid or cone is one third the volume of its rectangular prism or cylinder....

From El'endia Starman

How to draw a floating/levitating cube. 3D trick art on line paper anamorphic optical illusion. Materials used: 110lb cardstock, HB pencil, 2B pencil, Blue bic pen, red bic pen, black fine line pen, ruler, scissors Total time: 14 minutes 46 seconds ...

From Jonathan Harris

Having previously made two shorter product videos for the client this was a different kind of project. The brief was to document the work and craftsmanship that goes into making one of these tables. They are expensive pieces of furniture so one of the key...

From Morph

How to make an origami Rose (Nakashima Rose) Designed by Jo Nakashima (12/feb/2013) Support my channel! http://www.patreon.com/jonakashima Dedicated to Miyoko Sasaki Difficulty level: intermediate (only one tricky step) If you think the rose is not ver...

Klee Irwin, director of Quantum Gravity Research, talks about the tetrahedron, the most fundamental building block of our 3D reality according to emergence theory. VISIT THE QGR BLOG: http://www.quantumgravityresearch.org/blog VISIT THE QGR WEBSITE: htt...

英皇教育數學科名師-MC MO 如果數學難題，歡迎INBOX我喔~ fb: page: http://bit.ly/25N6arH fb: MC MO ig: mcmo_maths —中大數學系畢業，數學教育碩士生 —兩度榮獲教育局頒授表揚教師狀 —日校最受歡迎教師...

From MC MO Maths

Buy The Brain Cube here: http://mrblesbra.in/RivMS1 Ready to Make Your Head Spin? Nothing against those run-of-the-mill puzzle cubes out there (you know the ones), but your brain is ready for a bigger challenge. Your brain is ready for The Brain Cube. Th...