Divide the circumference by 2*pi will give the radius of the circle.
Pi can be used to calculate the area of a circle Pi can be used to calculate the circumference of a circle
To calculate the area of a circle use this formula: pi x r2.
A circle is two dimensional, it has area but not volume.
The answer depends on what characteristic of a half circle you want to calculate: its area or perimeter or something else.
7*pi which is about 22 units of measurement
Divide the circumference by 2*pi will give the radius of the circle.
at the equator.
Pi can be used to calculate the area of a circle Pi can be used to calculate the circumference of a circle
Diameter * pi (3.14159...) = circumfrerence
Find the diameter of the circle, which is the length from one side of the circle to the other (in the exact centre, of course.) Multiply this number by Pi, which is a number somewhere between 3 and 4 (it starts out as 3.141, but the decimals go on infinitely.) The circumference of the circle is then - assuming the diameter is 2 - 6.282, because that is the answer to 2 x π (π represents Pi.)
To calculate the area of a circle use this formula: pi x r2.
Radius of a circle is half the diameter. For any given circle draw a straight line from one point on the circulference, through the circle centre, to the opposite point on the circu,afenrece. Then taking a rule measure the straight line distance. That is the diameter(d) Half of this distance, that from the circle dentre to the circumference is the radius(r). r + r = d or 2r = d or r = d/2 From this straight line we can calculate both the area (A)and the circuference(C) by using the following eq'ns/ C = 2pir = pi*d A = pi *r^(2) 'pi' is a constant for all circles. and the number 3.14 or 3.1416 or 22/7 are used in these APPROXIMATIONS.
Radius of a circle = diameter/2
Multiply the radius by 2 and multiply the result by 3.141592654....(pi)
Width Of Circle X 3.14 or PII
A circle is two dimensional, it has area but not volume.