The radius of the circle is: 24 units.
What is sector?
A sector is said to be a part of a circle made of the arc of the circle along with its two radii.
Central angle= 210
Arc length= 28 π units
length of sector= [tex]\theta[/tex]/360* 2πr
28 π = 210/360* 2*r
28= 7/12*2*r
28= 7/6 * r
r= 28*6/7
r= 24 units.
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