Amazing property of the Canadian one dollar coin you didn't know aboot

Some coins are non circular, but many of there are still shapes of constant width. Like the Canadian Loony and the British 50p coin. Original Canadian bank note laser video: https://www.youtube.com/watch?v=iMGvTYDC5MA Canadian money smell test video: https://www.youtube.com/watch?v=2KEQCudRqbY Shapes of constant width: http://mathsgear.co.uk/products/shapes-of-constant-width-in-acrylic-set-of-4 Solids of constant width video: https://www.youtube.com/watch?v=a65VLLFYU6k Solids of constant width at Maths Gear: http://mathsgear.co.uk/products/solids-of-constant-width?lssrc=related Tau vs Pi smackdown: https://www.youtube.com/watch?v=ZPv1UV0rD8U Visit my blog here: http://stevemould.com Follow me on twitter here: http://twitter.com/moulds Buy nerdy maths things here: http://mathsgear.co.uk