AMC law of cosines problems
26 past AMC problems use law of cosines. 2 come from the AMC 10 and 24 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 12A · Problem 8
- 2025 AMC 12A · Problem 16
- 2025 AMC 12B · Problem 21
- 2024 AMC 12A · Problem 19
- 2023 AMC 12B · Problem 17
- 2023 AMC 12B · Problem 20
- 2022 AMC 12A · Problem 12
- 2022 AMC 12B · Problem 19
- 2019 AMC 12B · Problem 25
- 2018 AMC 10B · Problem 22
- 2018 AMC 12A · Problem 20
- 2018 AMC 12B · Problem 25
- 2017 AMC 12A · Problem 24
- 2016 AMC 12A · Problem 21
- 2014 AMC 12A · Problem 20
- 2013 AMC 12A · Problem 12
- 2013 AMC 12B · Problem 24
- 2012 AMC 12A · Problem 16
- 2010 AMC 10A · Problem 19
- 2010 AMC 12A · Problem 17
- 2009 AMC 12A · Problem 13
- 2008 AMC 12B · Problem 25
- 2006 AMC 12B · Problem 23
- 2003 AMC 12B · Problem 21
- 2002 AMC 12A · Problem 23
- 2002 AMC 12B · Problem 23
Back to all geometry problems.