# How did they make the pi?

pi is when you take any circle and divide the circumference (distance around the outside) by the diameter (distance across the center)

### How is pi used in todays world?

Pi is used in nearly every branch of math. If you need to do anything with a circle, pi was used to make that circle. Any measurement of a circle, cylinder, sphere, etc involves pi. Pi is incorporated into the GPS. All kinds of things use pi. A fun fact for pi: the actual length of a river compared to the straight distance from source to mouth will yield pi.

### How many digits make up pi?

Pi is infinite. It can't be converted into a accurate fraction. 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679 8214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196 4428810975665933446128475648233786783165271201909145648566923460348610454326648213393607260249141273 724587006606315588174881520920962829254091715364367892590360011330530548820466521384146951941511609...

### How can you make rational of i power i?

It is NOT rational, but it IS real. Start with Euler's formula: e^ix = cos(x) + i*sin(x) for all x. When x = pi/2, e^(i*pi/2) = cos(pi/2) + i*sin(pi/2) = 0 + i*1 = i or i = e^(i*pi/2) Raising both sides to the power i gives i^i = e^[i*(i*pi/2)] = e^[i*i*pi/2] and since i*i = -1, i^i = e^(-pi/2) = 0.20788, approx.

### What are some activities for pi day?

For Pi Day, you can really make the day fun with different activities. If you are a teacher, you can read them a math book on diameter, radius,circumference and pi. You can also buy a cookie pie or regular pie and serve it to you students/guests. You can also make a pi chain which is made out of loops of different pieces of construction paper. On each link, you write a digit from the number…

### Did Leonhard Euler made pi?

NO! Of course he didn't make pi. Pi is a constant that describes the ratio between the circumference and diameter of a circle. So he can not have made pi as it is a constant. Also, he didn't discover pi either, the earliest use of this constant is by the egyptians upon building the great pyramid at Giza in which 2*pi was used as the ratio between the height and perimeter of the pyramid. So…

### What is the circumference of a circle with a diameter of 12.6 inches?

The formula for circumference of a circle is pi*d or 2(pi)r The first is better since we already have the diameter. To solve this, simply multiply the two You can leave your answer was 12.6(pi) or make pi equal to 3.14 (not prefered, but ok for beginners) If you did choose to do this, you would get 39.564

### How do you divide by pi when pi is an infinite number?

(Pi) is not an 'infinite number'. It just can't be written exactly with any finite number of digits. But there are plenty of digits available, to make your division as accurate as you want it. You can never get an exact answer, just like you can never write the exact value of (pi), but you can get as close as anyone will ever need to get.