Circumference — AMC & AIME Problems
Practice every real AMC 8, AMC 10, AMC 12, and AIME problem that uses Circumference — 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).
Filter by difficulty
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 8
1988 AMC 8 Problem 13 • 2006 AMC 8 Problem 7 • 2007 AMC 8 Problem 16 • 2008 AMC 8 Problem 18 • 2013 AMC 8 Problem 25 • 2024 AMC 8 Problem 22 • 2026 AMC 8 Problem 11 • 2026 AMC 8 Problem 23
AMC 10
2001 AMC 10 Problem 17 • 2006 AMC 10A Problem 15 • 2006 AMC 10B Problem 6 • 2009 AMC 10A Problem 19 • 2010 AMC 10A Problem 5 • 2011 AMC 10B Problem 12 • 2015 AMC 10A Problem 14
AMC 12
1950 AMC 12 Problem 34 • 1952 AMC 12 Problem 43 • 1956 AMC 12 Problem 45 • 1960 AMC 12 Problem 6 • 1962 AMC 12 Problem 5 • 1965 AMC 12 Problem 2 • 1968 AMC 12 Problem 1 • 1970 AMC 12 Problem 2 • 1970 AMC 12 Problem 21 • 1970 AMC 12 Problem 32 • 1978 AMC 12 Problem 2 • 1982 AMC 12 Problem 4 • 1985 AMC 12 Problem 2 • 1987 AMC 12 Problem 13 • 1995 AMC 12 Problem 7 • 2001 AMC 12 Problem 8 • 2008 AMC 12B Problem 14 • 2011 AMC 12B Problem 8