16 November 2023

• 07:4507:45, 16 November 2023 diff hist +11 m 2023 AMC 12B Problems/Problem 11 →Solution 3 (Trigonometry)

15 November 2023

• 22:2422:24, 15 November 2023 diff hist +1,350 2023 AMC 12B Problems/Problem 11 Added a solution using the equation x^2+y^2=1 and using the trigonometric general form of that to maximize the area.

23 June 2020

• 17:1817:18, 23 June 2020 diff hist +2 m Shoelace Theorem →Proof 1

14 August 2018

• 15:4915:49, 14 August 2018 diff hist +4 m 2018 AMC 10A Problems/Problem 12 →Solution 1