The area of a circle is 196 pi square inches. what is the exact length of the circle's radius?

Area of a circle:

     "r" is the radius

Since you know in², you can plug (196) for "A" in the equation

 Divide pi on both sides

196 = r²     Square root both sides

14 = r

goog may have it for you

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2