Here are three:
If you have the area - radius = sqrt( A/Pi )
If you have the diameter - radius = D/2
If you have the circumference - radius = (C/(2Pi))
The formula is 2pie(radius).
radius = 1/2 diameter
3.14 times the radius times 2
To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi
what is the radius? It depends on the the radius. Formula 3.14*radius squared*5=answer
radius = diameter/2
radius = diameter/2.
The formula is 2pie(radius).
The formula for the area of a circle is pi times the radius squared. The formula for the circumference of a circle is two times pi times the radius.
-- Take the formula for the area of the circle in terms of the radius . . . A = (pi) R2-- Solve that formula for 'R'. You'll then have a formula for the radius in terms of the area,which is exactly what you're looking for.
Well the formula for the radius of the square is radius squared * pi (3.14)So find the radius (which is half of the diameter. which is exactly half of the shape)and do the formula. end the answer with "m".
Well to find the radius it is diameter/2.
Radius, "R" = D/2 where D=Diameter.
A radius is a line segment. It has no area.
Diameter = 2*Radius
3.14 times the radius times 2
radius = 1/2 diameter