What is the area of the shaded part?

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I need help finding the shaded part of this image. The answer also has to be in 1 decimal point.

1 Answer
sjc
May 7, 2018

#37.7cm^2(1dp)#

Explanation:

the shaded area is the area of the large circle minus the smaller circle

larger circle#=pixx4^2=16picm^2#

smaller circle#=pixx2^2=4picm^2#

shaded part#=16pi-4pi=12picm^2#

#=37.6991184#

#=37.7cm^2(1dp)#

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