Pie is a pastery that is filled with a food of some sort and baked in the oven. Pies can be made as entrees or desserts.
Pi is a mathematical constant, it is the ratio of the curcumference of the diameter of a circle.
E=mc2 is an equation representing mass-energy equivalence. This means that anything having mass has an equivalent amount of energy.
The variable E represents energy
The variable m represents mass
The variable c represents the speed of light constant.
Pi (oddly enough) = 4 - 4/3 + 4/5 - 4/7 + 4/9 - 4/11 + 4/13 - 4/15 ...
The only odd thing about the above (other than it being like that) is that I learned about it on NETFLIX!!! Who knew you could learn anything from there?