## anonymous 5 years ago Find the radius, if the angle is 90degrees and the arc is 104

1. anonymous

i'm guessing this is a circle with an arc length of 104?

2. anonymous

yea

3. anonymous

if so then the 104 is a fourth of the circumference circum = 2pi*r

4. anonymous

circum = 4*104

5. anonymous

416?

6. anonymous

ya then just solve for r

7. anonymous

so than divide 416 by

8. anonymous

r = 208/pi

9. anonymous

66.24

10. anonymous

arc=angle * r [104=(\pi/2)*r\] $r=(2*104)\div(\pi)$ $r=208/\pi$