Three Cuts to Turn a Round Cake Into Eight Equal Slices

Question: You have a birthday cake and have exactly 3 slices to cut it into 8 equal pieces. How do you do it?

Answer: 
Cut #1 – Down the center of the cake (vertically) leaving two equal halves.
Cut #2 – Across the center of the cake (horizontally) leaving four equal slices.
Cut #3 – Through the middle edge of the cake slicing all four of the pieces in equal halves, leaving eight equal slices (four equal tops and four equal bottoms).

See Explanation on pic:

Three Cuts to Turn a Round Cake Into Eight Equal Slices

Three Cuts to Turn a Round Cake Into Eight Equal Slices