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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 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 raduis of a circle knowinng only the circumference?
Radius = circumference/pi
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 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.
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.
