The Kissing Coins Problem

What is the smallest circle that encloses three touching coins? Oxbridge Mathematician Dr Tom Crawford explains the solution with some help from GXWeb - try it for free here: https://gxweb.app Thank you to Saltire Software for partnering in this video. Check out the free browser-based interactive geometry software GXWeb here: https://geometryexpressions.com/gxweb/ The more advanced Windows version with extra features - Geometry Expressions - can be accessed here: https://geometryexpressions.com/gx/explore/index.html Produced by Dr Tom Crawford at the University of Oxford. Tom is Public Engagement Lead at Oxford University Lifelong Learning: https://www.conted.ox.ac.uk/profiles/tom-crawford For more maths content check out Tom's website https://tomrocksmaths.com/ You can also follow Tom on Facebook, Twitter and Instagram @tomrocksmaths. https://www.facebook.com/tomrocksmaths/ https://twitter.com/tomrocksmaths https://www.instagram.com/tomrocksmaths/ A HUGE thank you to my patrons: David Silver Hiroaki Minato Dr Peet Morris Art Welch Cheung Yuk Shing Lewis Mackay Pablo John Hanson Bin Liu Denise Delicious Rose Symmetrik Jeryagor Cooper Healy Oscar Leung Rodhern Support Tom's work via Patreon here: https://www.patreon.com/tomrocksmaths