What is the arc length the car traveled, to the nearest hundredth?
A. 7.91 feet B. 8.32 feet C. 10.99 feet D. 11.89 feet
set up a proportion with the ratio of the angle to 360 on one side, equalling the unknown arc length over 2pi*r
or you can use arc length = radius * angle in radians
angle's in degrees tho
radians = degrees * pi/180
proportion is easier don't bother messing with radians
well the above is also useful to know
How do I find the radius?
d you are given the diameter = 30 ft
have you got the answer
How do I get the radius when I am given the diameter?
by prossi's method we have 42/ 360 = x / 2pi * 15 or using radians x = 15 * 42 * pi/180
radius = half of the diameter
I got it, It's 10.99 feet
thank you :)
i think the radians method is slightly easier
Me too, that's the one I used
all you need remember is that pi radians = 180 degrees
so to convert degrees to radians you multiply by pi/180 and for the reverse you multiply by 180/pi