Best Answer

In certain formulas, including most that involve circles, you will see 'pi'.

This pi always has the same value, approximately 3.14159...

However, this number is irrational, which means it never terminates (ends) or repeats.

But what exactly is pi? Pi is the ratio between any circle's circumference and its diameter. This ratio is always the same, no matter how big or small the circle is, but the degree of precision might vary depending on how big the circle is.

Why is Pi useful?

Pi allows us to calculate the diameter or area of any circle, but also has many other uses.

In order to use these formulas, though, we need to define the terms we are using.

Circumference - the distance around the circle

Diameter - the length of a straight line segment that passes through the center of the circle

Radius - the distance from the center of the circle to the circle itself

To calculate the circumference, multiply the diameter by pi (3.14...)

To calculate the area, square the radius, then multiply this by pi (3.14...)

In symbols:

Circumference = diameter x pi

Area = (radius)2 x pi

Hope this helped.

Q: What does pi the formula in math stands for?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

there is no s in PI

A circumference is the distance around a circle. To find a circle's circumference you need to follow the formula: d*pi The d stands for diameter and pi is 3.14. You need to mulitply the length of the diameter by pi for the circumference. Or, if the diameter isn't given, multiply the radius by 2 and then multiply that by pi.

The area of a circle is pi times r squared.

Here is the formula for area (you do the math) pi = 3.14 r = radius Area = pi * r2

That's the formula for the circumference of a circle, when you know the radius. What you do is multiply all three together. Pi is approximately 3.14, and r stands for the radius. The result of the multiplication is the circumference.

Related questions

there is no s in PI

The formula of percentage is pi. This is used in math.

A circumference is the distance around a circle. To find a circle's circumference you need to follow the formula: d*pi The d stands for diameter and pi is 3.14. You need to mulitply the length of the diameter by pi for the circumference. Or, if the diameter isn't given, multiply the radius by 2 and then multiply that by pi.

That's the formula for the area of a circle.

The area of a circle is pi times r squared.

Well, first you need to know the formula for what you are doing (usually with pi it is area or circumference).

Here is the formula for area (you do the math) pi = 3.14 r = radius Area = pi * r2

Ramanujan

Multiply the diameter by Pi as the formula Pi x d = Circumference. Where d stands for diameter.

Pi=3.14 in basic math

That's the formula for the circumference of a circle, when you know the radius. What you do is multiply all three together. Pi is approximately 3.14, and r stands for the radius. The result of the multiplication is the circumference.

This is a play on words on the well known area of a circle formula; (pi)r^2 pi= 3.14 and r stands for your radius. BTW Pie are round.