My friend needs to know for her geog cw, help!
2007-11-10 02:42:22 · 1 answers · asked by Who's your Doctor? 6 in Science & Mathematics ➔ Mathematics
As-simple-as-possible answers would be very much appreciated! Thanks!
2007-11-10 02:59:32 · update #1
It is the central angle (formed by two radii) that determines the portion of the circle. If you have a fixed radius, the length of the arc of the circle subtended by the central is rx where r is the radius and x is the central angle measured in radians.
pi radians = 180 degrees. pi/2 radians = 90 degrees. pi/6 radians = 30 degrees. x degrees = pi*x/180 radians.
But I think it easier to just use degrees. If 1/12 of the pie chart is to represent something, the 360/12 = 30 degrees would be the central angle to express this portion. length of radius is not important.
2007-11-10 02:57:27 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋