Pi is used in the equation to determine the volume of a cylinder with r being the radius and h being the height of the clynder: V = Pi*r2h
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The volume of a cylinder is equal to Pi times the square of the radius times the height of the cylinder. Pi*r2*h. Pi*r2 is the area of the base of a cylinder. The surface area of a cylinder is 2*Pi*r2+Pi*2r*h. 2*Pi*r2 is the area of the base of the cylinder times two to account for both bases. Pi*2r*h is the circumference of the base times the height of the cylinder
In math terms, pi, means 3.14, which is a everlasting decimal, that is just rounded to make your math easier. So pi, means 3.14 in math terms.
Total surface area including the two end pieces = (2*pi*radius2)+(2*pi*radius*height) in square units.
Leaving in terms of pi means, through out the whole answer you have the pi symbol when you sub and compute. So basically heres an example: 2pir r=14 2pi14 28pi your answer is 28 with the pi symbol on the right but I dont know how to write it on the computer was that of help?
Area of a circle = (pi)r2 [Areacircle = pi time the radius squared.] Volume of a cylinder = (pi)r2h [Volumecylinder = pi times the radius squared times the height.] (This applies to a right circular cylinder. :)