Area of a circle is: A=π*r2 and r=circumference/2.
Find 1/2 of the circumference and square it (multiply by same number), then multiply by pi.
Area of a circle = 3.14 * r2 Thus, radius, r = root of ( Area of a circle / 3.14 ) --------- equation 1 Circumference of circle = 2 * 3.14 * r Therefore, from (equation 1), Circumference = 2 * 3.14 * root of ( Area of a circle / 3.14 ). In a nutshell, first find the radius and then the circumference.
What do you have? The area of the circle or the circumference? Area: divide the area by pi, then square root it Circumference: divide the circumference by 2 then divide it by pi
You will have to measure some part of the circle. As long as you have absolutely no information about a circle, you can't do any calculations.
Divide its circumference by 2*pi which will give the radius of the circle. Area of the circle then is pi*radius squared
Square root (Area/pi) to get the radius Then 2xRadiusxPi= Circumference
The circumference is: 32.1
The area of a circle when the circumference is 10 inches is: 7.96 square inches.
3020.68cm2
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.
Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius squared
Area of a circle = 3.14 * r2 Thus, radius, r = root of ( Area of a circle / 3.14 ) --------- equation 1 Circumference of circle = 2 * 3.14 * r Therefore, from (equation 1), Circumference = 2 * 3.14 * root of ( Area of a circle / 3.14 ). In a nutshell, first find the radius and then the circumference.
Area of the circle = (circumference)2 / (4 pi)Area = 0.0796 circumference2(rounded)
What do you have? The area of the circle or the circumference? Area: divide the area by pi, then square root it Circumference: divide the circumference by 2 then divide it by pi
You will have to measure some part of the circle. As long as you have absolutely no information about a circle, you can't do any calculations.
They would have to give you enough information to eventually get the diameter. If they gave you the area of a circle and asked for the circumference, you can determine the radius, and from the radius the diameter, and then the circumference. If they said "What is the circumference if the area of a circle is 36pi?" Area of a circle is pi*r2, which would give us a value for r = 6 Diameter is 2*r, or = 12. Circumference is d*pi, or 12pi
Divide its circumference by 2*pi which will give the radius of the circle. Area of the circle then is pi*radius squared
Square root (Area/pi) to get the radius Then 2xRadiusxPi= Circumference