why isnt there a pie button??

Go to the top left and go one to the right. Or you can use 3.14

There is a pie button, it just depends on what type of calculator you are using

U dont need a pie buttom...

Pie = 3.14

Well technically you don't need a pie button all you need to do is put 3.14 in the problem for the pie symbol. It is a lot more easier that way.

The pi button is next to the [2nd] button at the top