the fraction of the circle covered by the arc
To find circumference you must multiply twice the radius by π, or using the diameter, if it gives it to you, multiply that by π.
you find the surface area of a circle by first finding the area of the circles/ two ends. you do this by multiplying the diameter by pi then multiply by two, that is both ends put together then you find the area of the flat part by finding out the circumference of the circle ends, then multiply that by the height of the cylinder. circumference= pi times the diameter then add all your calculation together, and you have the surface area of your cylinder :)
If you only have a given diameter you have to multiply the diameter by Pi (3.142) or 3.14 and then you get the circumference!
Multiply the length and width to find the area of both a rectangle and square.
Measure the inside diameter and multiply it by 3.14159 (pi)
find the circumference of the circle and multiply it by the height of the cylinder
Since pi is the ratio of a circle's circumference to its diameter, multiply the diameter by pi (about 3.14159) to get the circumference.
Find the circumference of the whole circle and then multiply that length by 95/360.
Multiply the diameter by the constant pi.
Find the circumference of the circles (the ends) and multiply it by the height of the cylinder. Then add that to the area of the ends.
C=2(3.14)rThis is circumference equation for circles. If you have the circumference, you need to input it into the equation and solve for r. r is the radius of the circle, so to determine the diameter, which is 2 times the length of the radius, you just need to multiply the number you got for r times 2.
The circumference of a circle = pi*diametre = 2pi*radius
Multiply each of the diameters by pi (pi = 3.14159265 or 3.14 for rough approximation) to find the circumferences of the circles.
This is the equation for the circumference... C= 2 x r x pi r = the length of the radius pi = 3.14159 To find to circumference just find the radius of your cricle that you want to find the circumference of. then simply multiply 2 and 3.14159 by the radius and your circumference is the answer
To find the length of coiled wire in the slinky, calculate the circumference of each circle by using the formula 2πr. Then, multiply this by the number of circles (assuming they are all the same size) to get the total length of wire used. Finally, convert the total length to inches if needed.
Pi times the diameter of a circle gives its circumference.
Circumfrences are only for circles.