Question

A circle has an area of 3.14 cm^2 . What is its radius?

Answer 1

Answer:

Cant be determined

Step-by-step explanation:

You would need the diameter to figure this out

Answer 2

The radius of the circle is 1 cm, if the circle has an area of 3.14 $cm^{2}$.

Step-by-step explanation:

         The given is,

                  Area of the circle is 3.14 $cm^{2}$,

Step:1

        The formula for Area of circle,

                    A = π$r^{2}$....................(1)

       where,

                   π - 3.14

                    r -  Radius of circle

Step:2

         From the given,

               Area, A = 3.14 $cm^{2}$

        Eqn (1) becomes,

                  3.14 = 3.14 × $r^{2}$                (∵ π = 3.14 )

                     $\frac{3.14}{3.14}$ = $r^{2}$

                     $r^{2}$ = 1

                    r = $\sqrt{1}$

                      = 1

                    r = 1 cm

           Radius of circle, r = 1 cm

Result:

      Thus the radius of the circle is 1 cm, if the area of circle is 3.14 $cm^{2}$.