Question 226384
area of a circle is equal to {{{pi*r^2}}}
r equals diameter / 2


Circle 1 has a radius of 8/2 = 4 inches.
Circle 2 has a radius of 6/2 = 3 inches.
Circle 3 has a radius of 2/2 = 1 inch.


Area of circle 1 equals {{{pi*4^2}}} = 16*{{{pi}}}


Area of circle 2 equals {{{pi*3^2}}} = 9*{{{pi}}}


Area of circle 3 equals {{{pi*1^2}}} = 1*{{{pi}}}


Differences in the areas is (16-9-1)*{{{pi}}} equals 6*{{{pi}}} equals 18.84955592 square inches.