AMC circumcircle/circumcenter/circumradius problems
16 past AMC problems use circumcircle/circumcenter/circumradius. 9 come from the AMC 10 and 7 from the AMC 12.
Picks a problem you have not seen, at about the difficulty you are handling.
Problems
Newest contests first. Every problem opens with its answer choices, hints and a worked solution.
- 2025 AMC 10B · Problem 5
- 2023 AMC 10B · Problem 3
- 2021 Fall AMC 10A · Problem 15
- 2021 Fall AMC 12B · Problem 9
- 2019 AMC 10A · Problem 6
- 2018 AMC 12B · Problem 21
- 2015 AMC 10B · Problem 19
- 2015 AMC 12B · Problem 19
- 2011 AMC 12A · Problem 25
- 2011 AMC 12B · Problem 20
- 2007 AMC 10B · Problem 4
- 2007 AMC 10B · Problem 11
- 2007 AMC 12A · Problem 10
- 2004 AMC 10B · Problem 22
- 2003 AMC 10A · Problem 17
- 2003 AMC 12A · Problem 11
Back to all geometry problems.