3 January 2020

• curprev 19:4219:42, 3 January 2020 Ar492 talk contribs m 3,496 bytes −4 →Solution 3
• curprev 19:4119:41, 3 January 2020 Ar492 talk contribs m 3,500 bytes +22 →Solution 3
• curprev 19:4019:40, 3 January 2020 Ar492 talk contribs m 3,478 bytes +4 →Solution 3

12 February 2019

• curprev 20:3420:34, 12 February 2019 Conantwiz2023 talk contribs 3,474 bytes +3 →Solution 3
• curprev 20:3420:34, 12 February 2019 Conantwiz2023 talk contribs 3,471 bytes +490 →Solution 2

7 February 2015

• curprev 22:5822:58, 7 February 2015 Haradica talk contribs 2,981 bytes +1,012 →Solution

4 July 2013

• curprev 08:5608:56, 4 July 2013 Nathan wailes talk contribs 1,969 bytes +15 →See Also

7 April 2013

• curprev 08:4408:44, 7 April 2013 JWK750 talk contribs 1,954 bytes +45 →See Also

12 February 2012

• curprev 14:2814:28, 12 February 2012 Gina talk contribs 1,909 bytes +1,909 Created page with "== Problem == A square region <math>ABCD</math> is externally tangent to the circle with equation <math>x^2+y^2=1</math> at the point <math>(0,1)</math> on the side <math>CD</ma..."