1 June 2018

• 21:5721:57, 1 June 2018 diff hist −15 2017 AMC 10B Problems/Problem 19 →Solution 6 (Area Comparison)

22 October 2017

• 11:2911:29, 22 October 2017 diff hist +1 m 2017 AMC 10B Problems/Problem 19 →Solution 5 (Barycentric Coordinates)
• 11:2811:28, 22 October 2017 diff hist +4 2017 AMC 10B Problems/Problem 19 →Solution 6 (Area Comparison)
• 11:2611:26, 22 October 2017 diff hist +54 2017 AMC 10B Problems/Problem 19 →Solution 5 (Barycentric Coordinates)

14 July 2017

• 15:2215:22, 14 July 2017 diff hist 0 m 2017 AMC 10B Problems/Problem 19 →Solution 6 (Area Comparison)

10 July 2017

• 17:0417:04, 10 July 2017 diff hist −8 m 2017 AMC 10B Problems/Problem 19 →Solution 6 (Barycentric Coordinates)
• 17:0317:03, 10 July 2017 diff hist +227 2017 AMC 10B Problems/Problem 19 →Solution 5 (Barycentric Bash)

11 December 2016

• 19:2819:28, 11 December 2016 diff hist +2 2016 AMC 10B Problems/Problem 16 →Solution 3
• 19:2419:24, 11 December 2016 diff hist +781 2016 AMC 10B Problems/Problem 16 →Solution 2