Timeline for Is there a pyramid with all four faces being right triangles? [closed]
Current License: CC BY-SA 4.0
17 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 4, 2023 at 13:01 | vote | accept | Humberto José Bortolossi | ||
| S Sep 27, 2023 at 7:06 | history | unlocked | CommunityBot | ||
| S Sep 27, 2023 at 7:06 | history | locked | CommunityBot | ||
| S Sep 27, 2023 at 7:06 | history | closed |
Gro-Tsen Loïc Teyssier Alex M. Daniele Tampieri Hollis Williams |
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| Sep 27, 2023 at 6:23 | answer | added | Mathin3D | timeline score: 3 | |
| Sep 27, 2023 at 1:16 | answer | added | Dalias | timeline score: 3 | |
| Sep 27, 2023 at 0:34 | comment | added | Robin Houston | en.wikipedia.org/wiki/Schl%C3%A4fli_orthoscheme | |
| Sep 26, 2023 at 23:54 | history | became hot network question | |||
| Sep 26, 2023 at 23:38 | comment | added | Michael Hardy | If three right angles are at one vertex, then you just have the corner of one octant of the usual $(x,y,z)$-Cartesian coordinate system. Are there points $(x>0,0,0),\,\, (0,y>0,0),\,\, (0,0,z>0)$ that are the vertices of a right triangle? No. Now the alternatives are: two right angles and one acute angle at one vertex, or at most one right angle at each vertex. | |
| Sep 26, 2023 at 23:33 | comment | added | Michael Hardy | "All four faces" seems to imply you mean a tetrahedron. If you had said "tetrahedron" rather than "pyramid", this would be clearer. | |
| Sep 26, 2023 at 20:11 | review | Close votes | |||
| Sep 27, 2023 at 7:09 | |||||
| Sep 26, 2023 at 16:19 | history | edited | Martin Sleziak |
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| Sep 26, 2023 at 16:13 | answer | added | Arsenii Sagdeev | timeline score: 21 | |
| Sep 26, 2023 at 16:07 | review | Low quality posts | |||
| Sep 26, 2023 at 16:16 | |||||
| Sep 26, 2023 at 16:06 | comment | added | Marco Ripà | See also math.stackexchange.com/questions/3214139/… | |
| Sep 26, 2023 at 16:00 | comment | added | Sidharth Ghoshal | Here’s a related Concept : en.m.wikipedia.org/wiki/Trirectangular_tetrahedron | |
| Sep 26, 2023 at 15:52 | history | asked | Humberto José Bortolossi | CC BY-SA 4.0 |