6 June 2025

• curprev 05:0005:00, 6 June 2025 Sevenoptimus talk contribs m 1,207 bytes +291 Added slightly more explanation

10 November 2024

• curprev 01:2101:21, 10 November 2024 Rawr3507 talk contribs m 916 bytes +55 →Solution: clarification

30 November 2021

• curprev 14:2614:26, 30 November 2021 StellarG talk contribs 861 bytes +51 →Solution

29 March 2020

• curprev 12:5112:51, 29 March 2020 Nerdowizard4578 talk contribs 810 bytes −286 →Solution

13 June 2017

• curprev 17:1317:13, 13 June 2017 Xiej talk contribs 1,096 bytes +1 No edit summary

18 August 2016

• curprev 16:1116:11, 18 August 2016 Dancer17 talk contribs 1,095 bytes +70 →Solution
• curprev 16:0516:05, 18 August 2016 Dancer17 talk contribs 1,025 bytes +2 →Solution
• curprev 16:0516:05, 18 August 2016 Dancer17 talk contribs 1,023 bytes −2 →Solution
• curprev 15:5715:57, 18 August 2016 Dancer17 talk contribs 1,025 bytes +2 →Solution
• curprev 15:5515:55, 18 August 2016 Dancer17 talk contribs m 1,023 bytes −2 →Solution

3 July 2013

• curprev 20:0320:03, 3 July 2013 Nathan wailes talk contribs 1,025 bytes +15 →See Also

16 February 2009

• curprev 02:5002:50, 16 February 2009 Misof talk contribs 1,010 bytes +1,010 New page: == Problem == Given the nine-sided regular polygon <math>A_1 A_2 A_3 A_4 A_5 A_6 A_7 A_8 A_9</math>, how many distinct equilateral triangles in the plane of the polygon have at least two ...