# What exactly is pi?

## What exactly is pi?

Succinctly, pi—which is written as the Greek letter for p, or π—is the ratio of the circumference of any circle to the diameter of that circle. Regardless of the circle’s size, this ratio will always equal pi. In decimal form, the value of pi is approximately 3.14. Measure the circumference with a ruler.

## What is pi actually used for?

In basic mathematics, pi is used to find the area and circumference of a circle. Pi is used to find area by multiplying the radius squared times pi. So, in trying to find the area of a circle with a radius of 3 centimeters, π32 = 28.27 cm.

What is pi where does it come from?

The first recorded use of π as a mathematical symbol comes from the Welsh mathematician William Jones in a 1706 work called Synopsis Palmariorum Matheseos, in which he abbreviated the Greek περιϕέρεια, (meaning “circumference,” or “periphery”) to its first letter: π.

### How do you use pi?

Use the formula. The circumference of a circle is found with the formula C= π*d = 2*π*r. Thus, pi equals a circle’s circumference divided by its diameter. Plug your numbers into a calculator: the result should be roughly 3.14.

### Will pi ever end?

Being an irrational number, π cannot be expressed as a common fraction, although fractions such as 227 are commonly used to approximate it. Equivalently, its decimal representation never ends and never settles into a permanently repeating pattern.

Who found pi?

mathematician Archimedes of Syracuse
Ancient Greek mathematician Archimedes of Syracuse, who lived in the third century B.C. and is considered the greatest mathematician of the ancient world, is credited with doing the first calculation of pi.

#### How was Pi calculated?

Here’s a brief history of finding π. The ancient Babylonians calculated the area of a circle by taking 3 times the square of its radius, which gave a value of pi = 3. The Egyptians calculated the area of a circle by a formula that gave the approximate value of 3.1605 for π.

Who is the father of pi?

Archimedes of Syracuse
The first calculation of π was done by Archimedes of Syracuse (287–212 BC), one of the greatest mathematicians of the ancient world.

## What if pi has an end?

Technically no, though no one has ever been able to find a true end to the number. It’s actually considered an “irrational” number, because it keeps going in a way that we can’t quite calculate. Pi dates back to 250 BCE by a Greek mathematician Archimedes, who used polygons to determine the circumference.

How to stop YouTube math antics, what is Pi?

– YouTube Math Antics – Circles, What Is PI? If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

### What to do if you cant play pi song?

If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer. Making science make sense.

### Is there such a thing as normal Pi?

We may receive a commission for purchases made through these links. If you bought a pulse oximeter to use at home, a device designed to measure the amount of saturated oxygen in the blood, you might have come across the term “normal PI.”

How to make science make sense [ pi song ]?

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