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circumference equal two times 'pi' times radius.
It is written algebraically as
C = 2pir
Since 2r = d (diameter) Then C = pi*d
Also the area (A) of a circle is
A = pi*r^(2)
'pi' is the constant of proportion of circles.
NB For school work pi = 3.14 or pi = 3.1416 or pi = 22/7
What else can I help you with?
What is the equation for the circumference and radius?
The equation for circumference is 2(3.14)(r) or 3.14(d) where r=radius and d=diameter. The radius of a circle is half of the circumference, or the distance across the interior of a circle.
What is the formula for finding the radius of a circle when you have the circumference?
Divide the circumference by 2*pi because 2*pi*radius = circumference
What is the circumference with a radius of 2.5?
The circumference of a circle with a radius of 2.5 is approximately 15.7075. The equation for the circumference of a circle is Circumference = 2πr where r is the radius. In our case, the radius is 2.5. We can approximate π to be 3.1415. So C = 2 * 3.1415 * 2.5, or C ~= 15.7075
How do you find a surcumference of a circle?
Formula for finding the circumference of a circle: 2 multiplied by pi multiplied by radius
If a circle has a circumference of 43.98 what is the radius?
If a circle has a circumference of 43.98 the radius is: 7 (6.999).
If you Give a circle with a diameter of 4 what is the circumference?
the equation for the circumference of a circle is 2*radius*pi, or since the radius is half of the diameter 2*radius=diameter, we can simplify the equation to the circumference of a circle=diameter*pi
What is the equation for finding the radius of a sphere when you know the circumference?
The equation for circumference is C=2(pi)(r) where C is the circumference and r is the radius. You can find the radius by plugging in the circumference into this equation and solving the equation.
What is the circumference of a circle with a radius of 15.5cm?
the equation for the circumference is Pi * double the radius which is 3.1416 * 15.5 * 2 The circumference of a circle with a radius of 15.5cm is 97.3cm.
What is the equation for the circumference and radius?
The equation for circumference is 2(3.14)(r) or 3.14(d) where r=radius and d=diameter. The radius of a circle is half of the circumference, or the distance across the interior of a circle.
What is the formula for finding the radius of a circle when you have the perimeter?
2*pi*radius = perimeter or circumference of a circle radius = circumference/2*pi
How do you measure the circumference of the circle?
The equation for the circumference of a circle is pi times radius squared.
How do you find the radius of a circle only knowing the circumference?
The equation for finding the circumference of a circle is diameter times pi so reverse it to circumference divided by pi which leaves the diameter. The diameter is twice as big as the radius so divide the diameter by 2 and you will find the radius.
What is the equation for getting the circumference of a circle with radius?
2x3.142xr
What is the circumference when the radius is r?
To find the circumference of a circle, use the equation: Circumference = 2*π*radius so when the radius is r, the circumference is 2πr
What is the formula for finding the radius of a circle when you have the circumference?
Divide the circumference by 2*pi because 2*pi*radius = circumference
What is the formula for finding the circumference of a circle when you only know the radius?
Circumference = 2 x pi x radius
What is the circumference of a circle if the radius is 4.83cm?
The circumference of a circle is given by the equation C=2*pi*r (r being the circle's radius). So, the circumference you're looking for is 30.35 cm.
