To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

File:Kepler's tetrahedron in cube.png

From Wikipedia, the free encyclopedia

Kepler's_tetrahedron_in_cube.png(636 × 442 pixels, file size: 536 KB, MIME type: image/png)

Summary

Description
Johannes Kepler discovered that the tetrahedron can be inscribed in the cube, occupying four of the cube's eight corners, with its edges as the diagonals of the six square faces. His drawing of the relationship between the two solids appears on page 181 of book V of his 'Harmonics of the World', published in 1619.
Date
Source Johannes Kepler (1619), Harmonices mundi libri V, detail of drawing from p 181, https://www.google.com/books/edition/Harmonices_mundi_libri_V/ZLlCAAAAcAAJ?hl=en&gbpv=1
Author Johannes Kepler (1619)

Licensing

Public domain

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.


This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

Captions

Kepler's drawing of the tetrahedron inscribed in the cube

Items portrayed in this file

depicts

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current22:19, 25 February 2019Thumbnail for version as of 22:19, 25 February 2019636 × 442 (536 KB)Dc.samizdatUser created page with UploadWizard
The following pages on the English Wikipedia use this file (pages on other projects are not listed):

Global file usage

The following other wikis use this file:

Metadata

Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.