SOLUTION: A circular arc of length 4 feet subtends a central angle of 180o. Find the radius r of the circle. r = Please explain Thank you

Question 929458: A circular arc of length 4 feet subtends a central angle of 180o. Find the radius r of the circle.
r =
Please explain
Thank you
Found 2 solutions by MathLover1, lwsshak3:
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
A circular arc of length 4 feet subtends a central angle of 180� degrees. Find the radius of the circle in feet.
where,
= central angle and = radius of the circle.

,.... but to be RADIANS
� => radians

or this way:
thus,

=>
=>
=>
=
or this way:
where angle is
(x*pi/180)

=

Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
A circular arc of length 4 feet subtends a central angle of 180o. Find the radius r of the circle.
***
, s=arc, r=radius, theta=central angle(radians)
180˚=π radians
4=rπ
r=4/π ft
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