pie r2
pi*d where pi = 22/7 (3.14 appx.) and d = diameter of the circle
Multiply the diameter times pi.
Not quite sure what you mean by "true way". You can measure it with a string or a similar flexible object. Or you can measure length and width, and - assuming it is an ellipse - use the formula for the circumference of an ellipse - or rather, an approximation formula.
To measure the circumference of an oblong shape, which is essentially a rectangle, you can use the formula ( C = 2 \times (L + W) ), where ( L ) is the length and ( W ) is the width. Simply measure the length and width of the oblong, then plug those values into the formula to calculate the total circumference. For more irregular oblong shapes, you might need to use a flexible measuring tape to trace around the perimeter.
No, in order to fine the arc length you need a formula which is: Circumference x arc measure/360 degrees
The circumference of a lampshade can be calculated using the formula ( C = 2\pi r ), where ( r ) is the radius of the lampshade's base. If you know the diameter, you can also use ( C = \pi d ), where ( d ) is the diameter. To find the circumference, measure the base's radius or diameter and apply the appropriate formula.
Multiply the diameter times pi.
Not quite sure what you mean by "true way". You can measure it with a string or a similar flexible object. Or you can measure length and width, and - assuming it is an ellipse - use the formula for the circumference of an ellipse - or rather, an approximation formula.
Because the circumference of a circle isn't a straight line its hard to measure, even if you have a flexi-ruler, your never going to be able to line it up to get an exact measurement. Therefore its much easier to measure the diameter and use the formula
To measure the circumference of an oblong shape, which is essentially a rectangle, you can use the formula ( C = 2 \times (L + W) ), where ( L ) is the length and ( W ) is the width. Simply measure the length and width of the oblong, then plug those values into the formula to calculate the total circumference. For more irregular oblong shapes, you might need to use a flexible measuring tape to trace around the perimeter.
circumference=r2pi
No, in order to fine the arc length you need a formula which is: Circumference x arc measure/360 degrees
It is not clear whether you want the formula of some aspect (area or circumference) of a circle when given its radius or a formula for its radius when given some characteristic measure of the circle.
Because:- circumference/diameter = pi and when the formula is rearranged circumference = pi*diameter
The circumference of a lampshade can be calculated using the formula ( C = 2\pi r ), where ( r ) is the radius of the lampshade's base. If you know the diameter, you can also use ( C = \pi d ), where ( d ) is the diameter. To find the circumference, measure the base's radius or diameter and apply the appropriate formula.
The formula for the circumference of a circle is the same, whatever its diameter. Circumference = pi*diameter.
use the formula pi*diameter = circumference and the formula diameter = 2*radius and combine them 2pi*radius = circumference now you have a formula that you can just plug you numbers into. if you have 3 as your radius, then this is how to find the circumference 2pi*3=circumference 6.28*3=circumference 18.84=circumference
The circumference of the top of a plastic cup is the distance around its circular opening. This can be calculated using the formula: Circumference = π x diameter. Simply measure the diameter of the top of the cup and multiply it by π (approximately 3.14) to find the circumference.