geometry
Circumference — AMC & AIME Problems
35 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.
LIVE focuses on challenge. As a social enterprise, we also explain standard school concepts one at a time, for free, on our sister site Expii. For this idea: Circumference and Pi, Arc Lengths, Types, and Names.
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 8
AMC 10
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
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