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# How do you get pi on a calculator without using the pi button? Is there a certain formula - like the formula for the golden ratio ( 1 plus the square root of 5 all divided by 2 )

Posted by Anonymous on

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335 / 113 will get you close. Sqrt(sqrt(2143/22)) will get you even closer.

Posted on May 17, 2014

• kakima May 18, 2014

If the calculator has trig functions, then arccos(-1) will give you pi (assuming you're in radians mode, of course).

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Posted on Jan 02, 2017

when you type -2 imagine your calculator doing the equation: -1 x 2. The - sign actually stands for a -1 so when you do -2 squared your calculator is simply following order of operations. It first squares the 2 making it 4, then it multiplies the negative making it -4. In order to get around this you must use parenthese. (-2)^2.

Hope this helped

Posted on Nov 23, 2008

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## Related Questions:

### What is pi eqaul to

The circumference (perimeter) of a circle is given by the formula
C = 2 (pi) (r), where r is the radius. Since radius is half of the diameter, d = 2 (r), so C = (pi) d.
Dividing both sides by d to get pi by itself, pi is the circumference of a circle divided by the diameter.

Pi is irrational, meaning that it goes on forever, without repeating numbers and cannot be represented as a fraction.

In everyday life, we often use 22/7 as an approximation of pi. Other people use 3.14.

I have memorized what my calculator gave me plus one more decimal, 3.1415926536.

Others have memorized it to thousands of digits and people have spent their lifetimes calculating pi to more and more decimals. Books have been written about pi.

Some schools celebrate Pi Day, since Pi begins with 3.14, it is celebrated on March 14th.

Good luck,

Paul

https://en.wikipedia.org/wiki/Pi

Jan 04, 2017 | Office Equipment & Supplies

### What is the area of a circle if the circumference is 2 pi inches

area formula is PI x r squared
that is 3.1417 times the radius of the circle squared
example is:- 3.1417 times 3 inches squared =3.1417 times 3x3=3.1417x9=28.279 square inches if you want to work back from a circumference measurement, the formula for circumference is 2 x PI x radius or PI x diameter
if you have a circumference of 12 inches then the dia is calculated 12 inches = dia x PI to get the diameter , divide the 12 inches by PI and that will be the diameter so that is 12 divided by 3.1417 =3.819 inches
now you can go from the first formula the radius is the diameter divided by 2 so the radius will be 3.819 divided by 2 = 1.909 inches
so applying the area formula it becomes 3.1417 times 1.909 times 1.909 =11.458 square inches
to find your answer simply substitute the dimensions in place of the example figures.in the relevant formula.

Aug 24, 2015 | Office Equipment & Supplies

### Unable to use pi (instead of 3.14) when using formulas which require pi

If you want to square an expression enclose it in parentheses and raise to the second power.

Jul 27, 2015 | Casio Scientific Calculator Fx-82es Plus

### Formula for circumference

Circumference of a Circle: 2 x pi x radius - OR - pi x diameter,

or if you need some sphere calculations?

Sphere Surface Area: 4 X pi X radius squared OR
pi X diameter squared Sphere Volume: 4/3 X pi X radius cubed OR
( pi X diameter cubed ) / 6
By the way.......... "pi" = 3.1415926536

Apr 29, 2014 | Office Equipment & Supplies

### How many jelly beans are in a jar thats 23 inches around and 17 inches high?

V = (pi)(r square)(h) V= Volume (the amount we need to calculate)
pi = 3.14...
r = radius of cylinder (remember this is half that of the circumference)
h = height of cylinder

To make it easier for you below are the figures for the Cylinder.
Height = 17 inches.
Now use the formula above to calculate it.

For the Jelly Bean its,
Height = 0.5
Use the same formula above for jelly bean as well.

Once you have both figures, divide Volume of Jar by Volume of Jelly e.g. VolumeofJar/VolumeofJelly

AND VOILA, you have the amount of jelly beans in a jar (Round the figure out)

Cheers!

Apr 28, 2014 | Texas Instruments TI-84 Plus Calculator

### What is pi

It is the ratio of a perfect circle's circumference to its diameter, ie

C = Pi * D

It has been calculated to trillions of digits as a decimal without ever beginning to repeat itself. It appears in many formulae describing the universe, including Einstein's General theory of Relatiivty.

Apr 09, 2014 | Mathsoft Computers & Internet

### Hello. I understand (sort of) that pi is an irrational number, which goes on to an infinite number of decimal places without repeating. What I would like to know, however, is; what is its formula, i.e...

Hi,
This is actually a surprisingly difficult question to answer, depending on how much trigonometry and/or calculus experience you have.
The simplest explanation would be to say that pi is the ratio of a circle's circumference to its diameter. Pi = c/d, where c is the circumference and d is the diameter. Meaning, if you drew a perfect circle, and could VERY accurately measure it's circumference and diameter, you could plug those two numbers into your trillion-digit calculator and you would get pi.
Obviously, that's not going to happen... But that would be ideal. I would recommend the pi Wikipedia page, as it discusses the history and evolution of pi calculations: http://en.wikipedia.org/wiki/Pi
Enjoy! -SJ

Aug 06, 2011 | Computers & Internet

### The base of a cylinder has a diameter of 6.2 cm. The cylinder is 18 cm tall. What is the volume of the cylinder?

When you have to deal with problems of this sort, you usually are given recipes or mathematical formulas which you apply to find the result. It so happens that for the volumes of cylinders, the formula to use is
Volume = Area of the base times the height=Ab*h
If the cylinder is circular, then the area of the base is that of a disk, Ab=PI*r^2`where r is the radius.
In your case, you are given the diameter (twice the radius) and the height.
Volume =PI*h*(6.2/2)^2, the unit being cm^2

To type in the value of PI, press [2nd] [^] (the latter is key under CLEAR, and above the division sign.
To raise a number to power 2 (to square it), use the key marked x with a superscript 2, or x with a raised 2.
After you have typed in all necessary ingredients in the formula, press the [ENTER] key and the calculator will give you the result.

Now, it is your turn to do some mathematics.

Jun 16, 2011 | Texas Instruments TI-84 Plus Calculator

### What is the pi button

Pi is a mathematical constant whose value is the ratio of any Euclidean plane circle's circumference to its diameter; this is the same value as the ratio of a circle's area to the square of its radius. It is approximately equal to 3.14159265 in the usual decimal notation.

Mar 05, 2011 | Casio FX82MS Scientific Calculator

### Excel formula

the formulae for the surface area of round disc is
pi * r * r
where pi=3.14 and r =radious of disc= diametre/2

for this 1st u have 2 calculate the radious of the disc that is
180/2=90mm
then convert it to  m by dividing 1000 ,so radious=90/1000=0.09 m
finally calculate the area= 3.14 * 0.09 * 0.09=0.025434 sq metres
for 38 disc multiply 38 with the above area that is
0.025434 * 38=0.966492 sq metres

in excel 2007  u can do it more easily by going 2 formulas tab.
Under formla tab click on engineering formula and  then convert
here u can convert from mm to m
after converting use the above formula i just told u.

Feb 27, 2008 | Computers & Internet

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