Question

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

Answer 1

Answer:

98

Step-by-step explanation:

C = 2πr

--->   196π  =  2πr                          (Now, divide both sides by 2π:

--->   196π / (2π)  =  2πr / (2π)

--->   98  =  r

Answer 2

Area of a circle:

$A=\pi r^2$      "r" is the radius

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

$A=\pi r^2$

$196\pi=\pi r^2$  Divide pi on both sides

196 = r²     Square root both sides

14 = r