Parallel lines — AMC & AIME Problems
Practice every real AMC 8, AMC 10, AMC 12, and AIME problem that uses Parallel lines — a geometry concept — each with a professionally curated solution, many with a video solution too, from LIVE by Po-Shen Loh. Browse all concepts or the full past-contest archive.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
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These problems’ difficulty ratings come from real solve attempts on our platform. Tap a band or a contest to filter the list below, and tap a selected band again to include all difficulties. See the full difficulty guide.
AMC 10
2000 AMC 10 Problem 5 • 2002 AMC 10A Problem 20 • 2004 AMC 10B Problem 20 • 2007 AMC 10B Problem 10 • 2009 AMC 10A Problem 23 • 2009 AMC 10B Problem 12 • 2011 AMC 10B Problem 17 • 2016 AMC 10B Problem 19 • 2021 AMC 10A Spring Problem 24
AMC 12
1953 AMC 12 Problem 26 • 1954 AMC 12 Problem 12 • 1958 AMC 12 Problem 47 • 1963 AMC 12 Problem 33 • 1965 AMC 12 Problem 4 • 1965 AMC 12 Problem 8 • 1966 AMC 12 Problem 32 • 1968 AMC 12 Problem 18 • 1970 AMC 12 Problem 30 • 1975 AMC 12 Problem 26 • 1981 AMC 12 Problem 5 • 2009 AMC 12A Problem 20 • 2009 AMC 12B Problem 9 • 2009 AMC 12B Problem 16 • 2011 AMC 12A Problem 13 • 2011 AMC 12B Problem 10 • 2013 AMC 12A Problem 11 • 2021 AMC 12B Spring Problem 11