Question

The area of a circle is 286 cm2. Use the π button on your calculator for π in your calculations.

8a
If its radius is r cm, find r, correct to 2 decimal places.
Be careful not to round your answer until the very end.

Answer 1

9.54 cm

Step-by-step explanation:

area = πr^2

286 cm^2= πr^2

=>πr^2= 286 cm^2

=>r^2= 286÷π

=>r= √286÷π

: 9.54. m

circumference=2πr

=> circumference=2×π×9.54

=60 cm