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A long time ago it was noticed that the ratio of the circumference of any circle to its diameter was a constant value; this value was called pi (π).
π is generally used with relation to arcs (and circle). It appears in many formulae relating to them:
- The length of the circumference (perimeter) of a circle is π times its diameter;
- The area of a circle is π time its radius squared;
It is also used in relating to things that are cyclic, for example waves and pendulums.
When angles are measured in radians, π is important as it represents a straight line (like 180°) and 2π radians represents a full turn.
π crops up with probability. Suppose you have a set of parallel lines a constant distance apart and you drop a needle onto them that is the same length as the distance between the lines, then the probability that the needle will cross a line is given by Pr = 2/π
The most astounding result containing π is one that also includes the two other famous numbers e (Euler's number or approx 2.7182818 - it is the base of natural logarithms) and i (the imaginary number that is the square root of -1: i² = -1 → i = √-1): raise e to the power of i times π and the result is -1, that is e^(iπ) = -1.
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What is the number that you use to find pi?
the number is that you use for pi is 3.14 the number is that you use for pi is 3.14
What is pi about?
Pi is the number you have to use to solve many circle equations. If you want to find the area of a circle, use radius squared times pi. For the circumference, use diameter times pi.
What is 136 times pi?
The answer is 427.04 if we use 3.14 as pi.
What is pi plus pi plus pi?
(pi + pi + pi) = 3 pi = roughly 9.4248 (rounded) Well, if you use the common shortened version of pi which is 3.14 and add that 3 times, you get 9.42.
What happens when the value of pi to be used is larger?
If you use the wrong value for pi, you will get wrong, and possibly contradictory, results.If you use the wrong value for pi, you will get wrong, and possibly contradictory, results.If you use the wrong value for pi, you will get wrong, and possibly contradictory, results.If you use the wrong value for pi, you will get wrong, and possibly contradictory, results.
What is the number that you use to find pi?
the number is that you use for pi is 3.14 the number is that you use for pi is 3.14
What is the diameter if the circumferance is 56 inches?
Just divide 56 by pi. Pi is approximate 3.14; or use the "pi" key on your scientific calculator.Just divide 56 by pi. Pi is approximate 3.14; or use the "pi" key on your scientific calculator.Just divide 56 by pi. Pi is approximate 3.14; or use the "pi" key on your scientific calculator.Just divide 56 by pi. Pi is approximate 3.14; or use the "pi" key on your scientific calculator.
Why do people use Pi?
people use pi to find the circumference of a circle.
What is pi about?
Pi is the number you have to use to solve many circle equations. If you want to find the area of a circle, use radius squared times pi. For the circumference, use diameter times pi.
How you use pi in school?
To find the diameter of a circle, you use pi to find the radius, because the middle of a circle is pi.
Who uses Pi?
3.14159265 That Pi? Many people use Pi. I use Pi in my math class.
What is the circumference of a circle with a radius of 8 feet?
use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi
What is circumference of a circle with a radius of 8 feet?
use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi
How did Ferinand Von Lindemann use Pi?
He was responsible for instituting the use of the symbol pi.
Why do you use pi when you can just use 360?
because pi is equal to 3.1415926535... not 360
Who were the first people to use pi?
The Hindus created PI
What is 136 times pi?
The answer is 427.04 if we use 3.14 as pi.
