Pi Math

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Pi is a very popular number in the world of mathematics. We most often learn about Pi when we begin studying geometry, to be more specific, circles. The number is most commonly seen as the decimal, 3.14159 or the symbol, π. We define Pi as the ratio of a circles circumference to its diameter. The circumference is the distance around the whole circle and the diameter is the distance from one edge of the circle to the other edge, right through the center. All though Pi is a number, many people contributed to discovering it, there are a few number of ways we are able to use it, and there are many intriguing facts about it. Pi is an irrational number and has an infinite amount of numbers beyond the right side of the decimal. It is expressed as …show more content…

To calculate the circumference of a circle, we multiply either the radius or the diameter by the pi, C=2 πr or C= πd. The radius is half of the diameter, so when using the radius you must first multiply it by two and then by pi. If you are using a calculator, you can simply do this by typing in the diameter and then the pi symbol. The symbol in the calculator automatically rounds pi to eleven decimal places. If you are trying to find the circumference by hand, you will need to round 3.14159 to 3.14 and then proceed to multiply by the diameter. To determine the area of a circle, you must find the radius. After you find the radius, you multiply it by itself, or take the number and put it to the power of two. The final step is to plug that number into the equation and multiply it by pi, A=πr^2. As said before, if you are using a calculator you simply push the pi symbol during your calculation or if doing it by hand, you must round pi to 3.14. Finally to determine the volume of a cylinder, you must find the height of the cylinder and the radius. Once you find the radius, you need to once again multiply it by itself. After you find these two numbers, you can then plug it into a simple equation like area and circumference, V=h πr². You first multiply the height by pi and then by the number we got when we multiplied the radius by itself. Like the others, when using the calculator, …show more content…

First, only thirty-nine numbers from the right side of the decimal point are needed to calculate the spherical volume of our entire universe. Second, there is a whole day dedicated to pi, known as National Pi Day. March 14th is the day we celebrate Pi, this day was chosen due to it being the 3rd month of the year and the 14th day of the month. This is significant because the first three numbers of pi are 3.14. Third, all digits of pi will never be fully known, which encourages scientists every day to see how far they are able to calculate. (Sylte, 2015) Finally, an approximate ratio also appears in the Bible, in 1 Kings 7:23: “And he made a molten sea, ten cubits from the one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did compass it round about.” (Hengeveld,

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