The radius of a circle is from the middle to the edge, or half the diameter. The circumference is like the perimeter of the circle, and the formula is pi times the diameter.
If the figure is truly a circle, then the circumference is (Radius) x (2 pi) .
radius = diameter/2 radius = circumference/2*pi
The radius would be about 2. To figure out the circumference it is (2)(3.14)(the radius). So I just reversed the situation to (12.62) / (3.14) / (2).
Circumference = 2*pi*radius or diameter*pi
Circumference = 2*pi*radius Radius = Circumference/(2*pi)
If the figure is truly a circle, then the circumference is (Radius) x (2 pi) .
Circumference is pi times diameter. Diameter is circumference divided by pi. Diameter is twice the radius. Radius is half the diameter.
radius = diameter/2 radius = circumference/2*pi
U take 3.14rsquare (r= radius)
The radius would be about 2. To figure out the circumference it is (2)(3.14)(the radius). So I just reversed the situation to (12.62) / (3.14) / (2).
Circumference = 2*pi*radius or diameter*pi
Circumference is the enclosing boundary of a curved geometric figure, especially a circle. Radius is a straight line from the center to the circumference of a circle or sphere. Pi is the numerical value of the ratio of the circumference of a circle to its diameter and does not have a circumference or radius of its own.
Circumference = 2 x {pi} x radius = {pi} x diameter
r = C /2 pi
Figure it out. AREA= 3.14 times the radius squared.
Take "pi" times the diameter of the circle. Pi = 3.14159 (ALWAYS) If circle has a diameter of 10cm, circumference 31.41cm If circle has a radius of 2inches, the circumference is 12.57 inches. (radius = 2, diameter = 4)
98pi ie 307.9m to one significant figure