It depends on the information that you do have. If you know the diameter, the circumference or the area the equations are relatively straightforward.
The formula is 2pie(radius).
To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi
to find the radius you have to measer trow the circle then divid by 2
Circumference=2*pi*radius
The formula to find area is you do the radius squared times pi or 3.14
The formula is 2pie(radius).
To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi
to find the radius you have to measer trow the circle then divid by 2
Well to find the radius it is diameter/2.
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".
you measuresit by the radius
pie multiplied by the radius.
Circumference=2*pi*radius
The formula to find area is you do the radius squared times pi or 3.14
-- 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.
There is a specific formula for finding the radius of a curvature, used often when one is measuring a mirror. The formula is: Radius of curvature = R =2*focal length.
this is called finding the circumference. The formula is 2*pie*radius