Question #04200

1 Answer
SCooke
Feb 11, 2018

#A = 254.47mm^2#

Explanation:

Math isn't always "rational". The the diameter is only "approximately" a value the mathematical result derived here really has very little value.

The relationship of a diameter to the area of a circle is:
#A = pixxr^2 = pixxd^2/4#

#A = pixx18^2/4 = 254.4690# rounding to the nearest 100ths:
#A = 254.47mm^2#

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