Art of Problem Solving
AoPS Online
Math texts, online classes, and more
for students in grades 5-12.
Visit AoPS Online ‚
Books for Grades 5-12 Online Courses
Beast Academy
Engaging math books and online learning
for students ages 6-13.
Visit Beast Academy ‚
Books for Ages 6-13 Beast Academy Online
AoPS Academy
Small live classes for advanced math
and language arts learners in grades 2-12.
Visit AoPS Academy ‚
Find a Physical Campus Visit the Virtual Campus

Revision history of "2005 AMC 12A Problems/Problem 15"

Diff selection: Mark the radio boxes of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.

(newest | oldest) View (newer 50 | ) (20 | 50 | 100 | 250 | 500)
  • (cur | prev) 17:02, 18 August 2023‎ Geosupercalc99 (talk | contribs)‎ . . (13,993 bytes) (0)‎ . . (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.)
(newest | oldest) View (newer 50 | ) (20 | 50 | 100 | 250 | 500)
Retrieved from "https://artofproblemsolving.com/wiki/index.php/2005_AMC_12A_Problems/Problem_15"