cir. of a circle is equals to pi xd.
hence,d=23/pi.
Taking pi to be 3.142,
d=7.32(3s.f)
Diameter of circle: 13/pi = 4.138 ft to 3 decimal places
circumference = pi*diameter so diameter = circumference/pi = 19.1 metres.
If the diameter is known, don't bother measuring the circumference.Simply multiply the diameter by 'pi'.
Just over 25' ( 8 x pi)
19 pi, ie 19 x 3.1415 = 59.69
Diameter of circle: 13/pi = 4.138 ft to 3 decimal places
What is 27 X 3.14? 27 pi
If the diameter is known, don't bother measuring the circumference.Simply multiply the diameter by 'pi'.
circumference = pi*diameter so diameter = circumference/pi = 19.1 metres.
Either pi times the diameter or pi times twice the radius (which is the diameter)
Just over 25' ( 8 x pi)
19 pi, ie 19 x 3.1415 = 59.69
39 inches / pi = 12.4 inches
30/pi = just over 9.5 cm
7/8 inch circle has a diameter of 7/8 and a radius of 7/16=.4375 circumferance of a circle = 2*pi*radius = 2*3.14*.4375 =2.7475 or 7*pi/8
R(10) If you know the Circumferance, divide it by Pi (about 3.14). That will tell you the diameter. Half the diameter equals the radius.
The circumference of a circle divided by its own diameter will leave you with pi which is about 3.142 correct to three decimal places.