pi is the number you use to find the circumfrence and area of a circle it is generaly use an 3.14 but it is actually infinative.
Infinitive is WAY different than Infinite. Please be careful with your words.
here is the first 4 numarels. 3.1415 when you use it in math, it is for the area or curcomfrance of a curcular object.
Pi is the ratio between the circumference of a circle and the diameter of said circle. It is represented by 3 things: 3.14, 22/7, and π