Radian Watch Giveaway #4

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radian watch
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.
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"The Radian 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