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It's important to know the formulas for all these characteristics of circles, and to recognize what they have in common.
Area of a circle = πr2
Circumference of a circle = 2πr or dπ
Where in the above equations r represents radius, and d is diameter (2r).
Both these equations have r in them. Find the radius using the circumference equation, and then plug it into the equation for Area
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How do you find the diameter of a circle with only the circumference?
Divide the circumference by Pi.
How do you find the raduis of a circle knowinng only the circumference?
Radius = circumference/pi
How do you find the circumference of a circle if you have the diameter?
If you have only the diameter to get the circumference you have to multiply the circumference by pi: 3.14
How do you find the radius of a circle when only given the circumference?
Divide the circumference by (2*pi)
How do find the circumference of a circle?
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
How do you find the area of a circle if you only know its circumference?
Divide its circumference by 2*pi which will give the radius of the circle. Area of the circle then is pi*radius squared
How do you find the circumference of a circle without knowing the area?
To find the circumference of a circle, you need only know the radius or diameter of the circle. The circumference of a circle is calculated as 2 x Pi x radius OR Pi x diameter. Pi is approximately 3.1415926.
How do you find the area of a circle when the only information you have is the circumference?
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.
How do you find the diameter of a circle knowing only the circumference?
to find the diameter of a circle when you only have the circomference you: divide the circomference by pi (approx. 3.14)
How do you find the radius of a circle with the circumference in terms of pi?
find the radius of a circle with circumference of 42.1
How do you find the perimeter if you already know the circumference of a circle?
The circumference of a circle is the length of the circle's perimeter.
How do you find the circumference of a triangle?
circumference is only in a circle. Circumference only applies to circles, ellipses, or other round objects. If you want to find the "perimeter," add up all three sides.
