One
No, pie can not eat itself.
half a pie
What you do is, diameter divided by two, then multiply the diamter already divided in half multiplying by itself, then you would times the squared radius by pie(3.14) Example; diameter is 6 divided in half equals 2 because 6 divided by 3 equals two then spuare it which will be 4, then times it by pie or 3.14 :):):):):):):):):):):):):):):):)
A third of a pie or a slice of a pie that is one third of the whole
1
1.57
The radius is the circumference divided by pie, all divided by two. :)
PIE divided by THINNESS minus missing SLICES plus MOULD
I'm assuming you mean pi x pi. pi itself is 3.1415926535897932384626 when squared (times by itself) it comes to 9.86960440109
1.8333
2/pi is about 0.6366197724
Probably not, because for example if you had two identical pies, pie A and pie B. Pie A was divided into eight pieces, and Pie B was divided into two pieces. If you were to eat on piece of Pie A, one eighth; that would be less than a piece of pie B, one half.