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Because the circumference of a circle divided by its diameter is equal to pi.
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∙ 10y ago
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Why we use pi in circular shape's formula?
Because the circumference of any circle divided by its diameter is equal to the value of pi which is an irrational number.
How is the perimeter calculated?
Although it is different for pretty much each shape, the basic answer is just that you add up the sides. For circular shapes the formula is: Pi X Radius to the 2nd power
Why don't the formulas on this page involve pi?
the other formulas involve non-circular shapes
How do you convert an area of 16.5 acres into a distance around an island?
assuming the island is circular.... use the formula Area=(pi)x(radius squared) to find the radius, then use the formula C=2(pi)(radius) to determine the circumference.
What shapes you use pi?
3.14
Why don't the other formulas on this page involve pi?
the other formulas involve non-circular shapes
What is the formula for the total volume of a right circular cylinder?
pi * radius2 * height
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
Formula for the volume of a right circular cylinder?
Pi x r² x h
Formula of volume of right circular cylinder?
Pi x r² x h
Calculate cross sectional area of wire?
If the wire has a circular cross-section - the usual case - use the formula for the circle: pi x radius squared.
