User contributions
- 20:59, 7 March 2019 (diff | hist) . . (+18) . . 2019 AMC 10A Problems/Problem 21 (→Solution 3 (similar triangles))
- 16:28, 23 February 2019 (diff | hist) . . (-3) . . 2019 AMC 10A Problems/Problem 21 (→Solution 4 (Similar Triangles))
- 16:27, 23 February 2019 (diff | hist) . . (+16) . . m 2019 AMC 10A Problems/Problem 21 (→Solution 4 (Similar Triangles))
