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- 19:34, 17 February 2008 (diff | hist) . . (-616) . . 2008 AMC 10A Problems/Problem 20 (Removing all content from page)
- 19:34, 17 February 2008 (diff | hist) . . (+616) . . N 2008 AMC 10A Problems/Problem 20 (New page: Draw isoceles trapezoid ABCD. Draw diagonals intersecting at K. Obviously, AKD is congruent to BKC. Likelywise, AKB is similar to CKD. Call the altitude to base AB of triangle AKB 3x and t...)
