It is: 72-lenghth of major arc = length of minor arc
17
Since π is the ratio between the diameter and the circumference, Diameter = 72 in /π = 22.92 in
It depends on what measure the 72 refers to - radius or diameter.
Circumference of a circle = 2*pi*radius or pi*diameter
It is 72 units.
17
15 in
As you were copying the question, did you notice the drawing alongside it ? Well, see, that sketch is actually part of the question; anybody who wants to try and answer it needs to see that drawing.
The arc represents 1/5 of the circumference (72 = 360/5) so the full circumference is 5 x 18.75 ie 93.75, which is 2 pi x the radius. The radius is therefore 46.875/pi, just over 14.9.
If this is a central angle, the 72/360 x (2xpix4) = 5.024
Circumference = 72*pi
Circles don't have "length", however: C = 2*pi*r d = pi*r Thus, the radius of a circle can be found by dividing the Circumference (C) by (2*pi): 72 cm / (2*pi) = 11.459 cm
72" radius = 452 25/64 " circumference
A circle with a radius of 72 inches has a circumference of 452.39 inches.
To calculate the diameter from the circumference, divide the circumference by pi - π 6' = 72 inches. 72 / π = 22.9 inches
Circumference = 72*pi
Since π is the ratio between the diameter and the circumference, Diameter = 72 in /π = 22.92 in