The "Pi in the Sky" math challenge gives students a chance to take part in recent discoveries and upcoming celestial events, all while using math and pi just like NASA scientists and engineers. In this problem from the set , students use the mathematical constant pi to calculate how far the Curiosity rover has traveled on the Red Planet based on its wheel rotations. Materials Pi in the Sky: Roving Riddle worksheet – download PDF Pi in the Sky answer key (second problem) – download PDF Backgroun