22 December 2019

• 15:2315:23, 22 December 2019 diff hist +1 m 2005 AMC 12A Problems/Problem 15 →Solution 5: Fixed respective coordinates of A, B, C

6 April 2016

• 13:5513:55, 6 April 2016 diff hist +52 Circumradius →Formula for Circumradius: Clarified that s refers to the semiperimeter.

31 January 2016

• 06:5306:53, 31 January 2016 diff hist −76 Principle of Inclusion-Exclusion →Examples: The "mathideas" link was broken and pointed to a spammy "warning" page, so I have removed it.

9 October 2014

• 16:4916:49, 9 October 2014 diff hist 0 Install Java →Windows/PC
• 16:4816:48, 9 October 2014 diff hist 0 Install Java →Windows/PC
• 16:4716:47, 9 October 2014 diff hist +1 Install Eclipse Updated Eclipse and Java version information. current
• 16:2116:21, 9 October 2014 diff hist 0 Install Java →Windows/PC: Updated Java version to "Java SE Development Kit 7u67"