On Monday afternoons, I host a math circle for elementary school kids on Bainbridge Island, WA, where my family and I live. The pictures above are from our practice on my birthday this year.
Team coach Anne Willhoit baked me a round cake and adorned it with a math problem to solve. There was a chord, length “k” drawn in frosting across the top, and a perpendicular line of length “p” bisecting it.
The card on the cake read: GIVEN k and p, find an expression for the radius of the circle.
Thank you to Anne and Ryan Willhoit, for the delicious treat!