Science Forums 2

[Turtle]

Originally Posted by gotpho

Well I realized you could find the arc length

s=r * radian of angle

but using 12 degree wasn't right. I realized that you had to subtract 90 degree from 12 to get the angle between the two points.

so the final formula

S=r*(90-12)*pie/180

Mmmm...my method wasn't far off. I get 5395.052507 miles using your equation, and 5810.056546 miles from mine. A variance of ~ 1%. (I used 1.314159 for pi)

PS hold on....

OK I get 5395.052507 for mine too; I subtracted 12 from 90 wrong and used 84 instead of 78.

Resume your normal activities.