Cadence Watch Company is preparing to stock the math-themed Radian watch for a third time (Don't worry, pi haters, the Tau watch
is out too!) That means we're are giving you yet another chance to win one! Sign up below.
Watch combines the unit circle with the 12 hour dial. I hope you
already know how to tell time, so we stuck 0 at the 3 o'clock position
like it belongs and the radians count up counter clockwise. I called
out the angle measurements at each of the hour positions and stuck the
eighths in there too. In the background is the subtle Archimedean spiral, because it looks cool and graphs the equation r = a + bθ."
Christopher Thompson, designer