Circumference of a circle is (pi * diameter). Area of a circle is (pi * r2).
Area = (Circumference squared)/4 pi Circumference = 2 sqrt(Area times pi)
area = {pi}r2 = 16{pi} --> r2 = 16 --> r = 4 circumference = 2{pi}r = 2{pi}4 = 8{pi}
We know that the area of a circle is pi * r2. We also know that the circumference of a circle is pi * d. Therefore, when you know the circumference of a circle and want to know the area, divide the circumference by pi to give you the diameter of the circle, divide the diameter by 2 to give you the radius, square the radius and then multiply by pi to get the area. So, 10/pi = 3.183. 3.183/2 = 1.5915. 1.59152 = 2.533 2.533 * pi = 7.958 to 3 decimal places. The area of your circle is therefore 7.958cm2.
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)
The circumference of the circle with a diameter of 64 mm is 64*pi = about 201 mm
Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius2
Circumference of a circle is (pi * diameter). Area of a circle is (pi * r2).
Pi is the number of times the diameter of a circle will fit into the circumference. Pi is not a circle, and does not have a circumference or area. To calculate a circumference USING pi, the circumference is diameter * pi. To find the area using pi, area = pi * radius * radius
Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius squared
Radius of circle: square root of (324/pi) = 10.1554125 cm Circumference of circle: 2*pi*10.1554125 = 63.80833861 or 64 cm to the nearest integer
Pi is related to the area and the circumference of the circle. The area is Pi multiplied by the radius of the circle squared and the circumference is Pi times the diameter of the circle. if you're wondering how it works, pi is the area of a circle with radius of 1 (unit), and the circumference of a circle with a radius of ½ (unit).
Area of a circle = pi*radius2 Circumference of a circle = 2*pi*radius or pi*diameter
Area = (Circumference squared)/4 pi Circumference = 2 sqrt(Area times pi)
Circumference = 16pi ie 2pi*r = 16pi so that r = 8 units Then area = pi*r2 = 64*pi square units.
Circumference=2Pir so 64 is Pixr and the radius is 64/Pi
The formula for the area of a circle is pi * radius squared. The circumference of a circle's formula is pi * diameter. NOTE: pi equals approx. 3.14