How do you find the radius of a sector when the area of the sector and the central angle is given ? Please can someone help me thank you..... :)

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Recall the area of a circle formula: A=πr^2.  So      ____r=√A/πIf you have a sector, then you can calculate what fraction of a circle you have. You can then calculate what the area of the whole circle is, and then use the area of the circle formula to calculate the radius.For example: Let's say you have a central angle of 57 degrees and a sector area of 20.You have 57/360 of a circle.(360/57) x 20 = 126.3 would be the area of the whole circle. ________√(126.3/π) = 6.34