You can. Area = 0.25*pi*d^2
Multiply the diameter by the value of Pi - and you'll have your answer !
To find the circumference of a circle then multiply pi (3.14159265...) by the diameter of the circle. To find the area then multiply pi by the radius squared.
To find the area of a circle, you multiply the radius by itself [squared] and then you multiply their product by pi. To find the diameter of circle, you can a)Multiply the radius by two b) Divide the area by pi, find the square root of that product and then multiply it by two.
-- take half of the diameter -- multiply it by itself ('square' it) -- multiply the result by 'pi' (roughly 3.1416) The result is the area of the circle. The formula is: A = (pi) R2 A = the area R = the radius, which is 1/2 of the diameter
Diameter implies circle Divide diameter by two square it. Multiply it by pi (3.14159...)
-- Take 1/2 of the length of the diameter. -- Square that number. (Multiply it by itself.) -- Multiply the result by 'pi' . That's roughly 3.1416 . -- The result now is the area of the circle.
Solve the equation for the area of the circle (area = pi x radius2) for radius. Multiply the radius by 2 to obtain the diameter.
All you have to do is multiply the radius by 2.
If you have the circumference: circumference = (pi) * diameter diameter = circumference / (pi) If you have the area: area = (pi) * radius * radius radius = square_root(area / pi) radius = diameter / 2 diameter = 2 * square_root(area / pi)
To find the area of a circle, here is the formula: A=Pi r2 To find area, you must square the radius and multiply it by pi. If it gives you the diameter, not the radius, divide the diameter by 2, that gives you the radius, then square it and multiply by pi.
Multiply the diameter by 3.14159 (Pi) to get the circumference multiply the diameter by pi. pi is 3.14159 * * * * * Depends on what information you have. You could multiply the area by 2/radius
That depends on what you know. If you know the radius of the circle, double it to get the diameter. If you know the circumference of the circle, divide it by π to get the diameter. If you know the area of the circle, find its square root and divide the result by π to get the radius then multiply by 2 to get the diameter.