# What decimal approximation is acceptable for pi?

Table of Contents

## What decimal approximation is acceptable for pi?

He also suggested that 3.14 was a good enough approximation for practical purposes.

## Who approximated the value of pi?

Archimedes of Syracuse

The Egyptians calculated the area of a circle by a formula that gave the approximate value of 3.1605 for π. The first calculation of π was done by Archimedes of Syracuse (287–212 BC), one of the greatest mathematicians of the ancient world.

**Can you use 3 for pi?**

The simplest approximation for Pi is just 3. Yes, we all know that’s incorrect, but it can at least get you started if you want to do something with circles. In the past, many math books listed Pi as 22/7.

**How do we approximate pi?**

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. Repeat this process with several different circles, and then average the results.

### Why is pi called pi?

Pi is defined as the ratio of the circumferenc of a circle and divided by the distance across, which is its diameter. It was first called “pi” in 1706 by [the Welsh mathematician] William Jones, because pi is the first letter in the Greek word perimitros, which means “perimeter.”

### What if pi was exactly 3?

Hamlin said if Pi really were 3.2 or 3, it would mean Pi was a rational number. Rational numbers include fractions, counting numbers, negative numbers, numbers with decimals that end (ex: 3.0374), and numbers with decimals that repeat (ex: 0.33333).

**Why is pi equal to 3 14159?**

Why is pi equal to 3.14159? As everybody knows pi=L/ (2*R)=L/D is the ratio of the circumference to the diameter for any circle. It is an irrational and transcendental number and since now we have discovered over 10^12 digits of it.

**What is Pi in math?**

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.

#### Is Pi an irrational number?

Pi is an irrational number. Unlike the rational numbers that have sections of repeating digits after the decimal, Pi’s digits look a little different. To give you an idea, here are just the first hundred digits of Pi: 3.14159265358979323846264 1170679. You can find Pi in nature, too.

#### What is the ratio of Pi to the size of a circle?

Regardless of the circle’s size, this ratio will always equal pi. In decimal form, the value of pi is approximately 3.14. But pi is an irrational number, meaning that its decimal form neither ends (like 1/4 = 0.25) nor becomes repetitive (like 1/6 = 0.166666…).