nfughs
Multiply the radius by 2 x pi.
The CD's circumference is 15.7 inches.
pi x 12 (diammeter of the CD) = 37.6991118 (the circumference of the CD)
if perimeter of cd=377mm perimeter of circle cd=2x22/7xr Using pie as 22/7 radius=> 2x22/7xr=377mm r= 120.0636943 r= 60.03184713mm -Keran Persaud Basiram
I think my grandpaents dies to minutees
Multiply the radius by 2 x pi.
The CD's circumference is 15.7 inches.
That's impossible. Cubic centimeters measure three demensions, and circumference measures one demension.
C = Pi * d 28.26 cm = 3.1415 * d d = 28.26 cm/3.1415 d = 8.9954 r = d/2 r = 8.9954 cm/2 4.4977 cm The radius of a CD with a circumference of 28.26 cm is about 4.50 cm.
Radius: rDiameter: dCircumference: Cd = 2rC = 2 Pi r = Pi dWhat_is_the_formula_for_finding_diameterSo make it c=Pi*dd=c/Pi
pi x 12 (diammeter of the CD) = 37.6991118 (the circumference of the CD)
The diameter of a CD is 11.43 so the radius is 5.715.
The diameter of a CD is about 12 cm, so since the radius is 1/2 of the diameter, that would make the radius about 6 cm. 5.23 cm
CD's have a diameter of 5.5 centimeters;)
12 cm approx I'm a little surprised that you haven't got a CD and some sort of ruler or measuring tape near you. The idea of a homework question like that is to help you get some idea of common sizes.
The radius of a circle is the distance from the centre to the edge. The diameter is the distance right across the circle through the centre. So the diameter of a circle is always twice its radius. So if the radius of a circular CD is 6cm, the diameter is twice this - 12cm.
if perimeter of cd=377mm perimeter of circle cd=2x22/7xr Using pie as 22/7 radius=> 2x22/7xr=377mm r= 120.0636943 r= 60.03184713mm -Keran Persaud Basiram