PI means

Question

Say the full form

Answer 1

PI is an irrational constant used with circles.

If you sliced a circle into ∞ pieces, connected those pieces as:
🔻🔺🔻🔺🔻🔺...
You would create a rectangle, with:
height of r (circle range)
and:
width of r * π (circle range multiplied with pi).
That's why circle area is r² * π.

Answer 2

Proportion integral meaning and it's purpose

Answer 3

Pi is an irrational no whose value is approximately 3.14