User contributions
- 16:02, 18 August 2023 (diff | hist) . . (0) . . 2005 AMC 12A Problems/Problem 15 (Minor math mistake in the last solution. Said that the ratio of the area of triangle DEC to area of triangle DCX is 1/3, when it's the ratio of the area of triangle DEC to the area of the triangle ABD that's 1/3.) (current)
