File:Roberts triangle theorem n=7.svg
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Size of this PNG preview of this SVG file: 432 × 504 pixels. Other resolutions: 206 × 240 pixels | 411 × 480 pixels | 658 × 768 pixels | 878 × 1,024 pixels | 1,755 × 2,048 pixels.
Original file (SVG file, nominally 432 × 504 pixels, file size: 665 bytes)
Summary
| Description |
English: Seven lines tangent to a semicircle form five triangular faces. According to Roberts's triangle theorem, every lines with no two parallel and no three meeting at a point must form at least triangular faces; this construction shows that this bound cannot be improved. |
| Date | |
| Source | Own work |
| Author | David Eppstein |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
 
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:57, 28 October 2022 | | 432 × 504 (665 bytes) | wikimediacommons>David Eppstein | Uploaded own work with UploadWizard |
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