If the circumference (not circumfrance) is 31.4, the radius is 4.9975 units (to 4 dp).
The area is 314 cm2
You press pi button on the calculator or type in 3.14 you then times it by the radius then square it. :) x
diameter ------------- Diameter. The R (radius) of a circle multiplied by two equals the diameter.
multiply the radius by two then pultiply that by pi
circumference = 2*pi*5
Work it out the circumfrance of a circle is pie x the diameter!
30 x 3.14 = 94.2
The circumference of a circle is twice the radius times PI [2*pi*r] with r = 4 >> about 25
Diameter. distasnce from center to edge is radius length around is circumfrance
circumference of a circle = pi*diameter or 2*pi*radius