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Remember the eqution and comit to memory
C = 2pir
or
C = pi d
Where 'C' is the circumference
'r' is the radius
'd' is the diamter.
and 'pi' is the constant of proportion of circles at 3.141592.... usually approximated to 3.14
e.g. If the radius is 5
Then C = 2 * 3.14 * 5
C = 10*3.14
C = 31.4
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How do you find the area of a circle without knowing the radius?
If the circumference or diameter is given then you can find the radius or simply measure the distance from the centre of the circle to the circumference.
What is the radius of a circle with a circumference 26 inches?
To find the radius of a circle with a given circumference, you can use the formula: circumference = 2 * π * radius. Given that the circumference is 26 inches, you can plug this value into the formula and solve for the radius. Dividing the circumference by 2π gives you the radius of the circle, which in this case is approximately 4.14 inches.
How do you find the radius of a circle if you know the circumference?
Given the circumference, divide the circumference by pi (3.1416) to give the diameter of the circle, then divide by 2 to find the radius (half of the diameter).Since C = (pi) D and D = 2r, then r = C/2piSee related links for more help with circles.
What is the radius of a 58 cm circumference circle?
Well, honey, if you want the radius of a circle with a 58 cm circumference, you just divide that by 2π, which gives you approximately 9.22 cm. So, there you have it, darling, the radius of that circle is about 9.22 cm.
How do you find the radius of a circle if you know the circumfrence?
radius = circumference/(2*pi)
How do you find the radius if circumference is given?
Divide the circumference by 2PI to find the radius. ( C = 2PI*Radius)
How can you find the diameter and the radius if the circumference is given?
Diameter = circumference/pi Radius = circumference/2*pi
How do you find length and width given the circumference?
If you mean the diameter and radius of a circle given the circumference it is:- diameter = circumference/pi radius = circumference/(2*pi)
When given radius how do you find the circumference?
Circumference = 2 * radius * pi (where pi is approx = 3.14159)So Radius = Circumference / (2 * pi)
What is the formula to find circumference when you are given the radius?
To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi
How do you find the radius of a circle when only given the circumference?
Divide the circumference by (2*pi)
When given the circumference how do you find the diameter and radius?
divide 3.14 by circumference and d=2r
How can I find circumference when only area is given?
Radius = square root of (area/pi) Circumference = 2*pi*radius
How do you find radius of a circle if circumference is given?
circumference = 2 x π x radius ⇒ radius = circumference ÷ (2 x π) Divide the circumference by two times π (≈ 6.283).
How do you find the area of a circle without knowing the radius?
If the circumference or diameter is given then you can find the radius or simply measure the distance from the centre of the circle to the circumference.
How do you find the radius of a circle when the circumference is given?
Divide the circumference by the value of Pi, then halve that result.
How do you find circumference of a circle given?
circumference of a circle = 2*pi*radius or pi*diameter
