geomerty
posted by Izzy on .
Find the arc legnth of Arc AB. Leave your answer in terms of pi.
arc is 45 degrees radius is 5

45/360 = .125
or 1/8 of the circumference
circumference = 2 pi r = 2 pi (5) = 10 pi
so 10 pi/8 = (5/4) pi = 1.25 pi 
the answers I have to pick from are
6 pie 8 units
3 pi 4 units
9 pi 4 units
9 pi 8 units
so is 9 pi 8 units the answer 
Well I get 10 pi/8 which is 5 pi/4