January 13–January 19, 2009

Problem

A convex octagon inscribed in a circle has side lengths 4, 4, 4, 4, 2, 2, 2, and 2. Find the area of the octagon.

octagon

Solution

here

List of solvers

Matt Inouye (undergrad); Koopa Koo, Justin Shih, Dustin Moody (graduate); Gary Raymond (staff); Marina Meila (faculty); Dean Anderson, David Bander, Chang Hai Bin, Alin Constantin, Mike Goodman, Peiyush Jain, Brad Heller, Vishwas Kulkarni, Joshua Lim, Elizabeth McCranie, Anand Rajagopalan, Lioyd Sakazaki, Zoheb Vacheri (outside).

Koopa Koo wins the prize!