if a circle has a radius of 65 m, determine the arc length the central angle of 1.25?
the answer at the back of the book says 162.5m.
... but when i calculate it i don't get that.... /:

Question

if a circle has a radius of 65 m, determine the arc length the central angle of 1.25?
the answer at the back of the book says 162.5m.
... but when i calculate it i don't get that.... /:

anonymous · Answer

i get 81.25

anonymous · Answer

http://www.mathopenref.com/arclength.html $$ArcLength = 2piR(C/360) ... 2\pi65(1.25/360) = 1.418$$ according to http://www.wolframalpha.com/input/?i=2pi65%281.25%2F360%29 Hrrrmmm... ??

anonymous · Answer

ok.. so then im not wrong right? /:

anonymous · Answer

http://www.handymath.com/cgi-bin/arc18.cgi?submit=Entry Enter the two known values here ... gets the same answer as Wolfram