Consider the pyramid O A B C. Let the equilateral triangle \mathrm{ABC} with side length 6 be the base. Also 9=O A=O B=O C. Let M be the midpoint of A B. Find the square of the distance from M to O C.
Consider the pyramid O A B C. Let the equilateral triangle \mathrm{ABC} with side length 6 be the base. Also 9=O A=O B=O C. Let M be the midpoint of A B. Find the square of the distance from M to O C.