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one are is equal to 2.470 cents
a could equal 0 and r could equal 27a could equal 1 and r could equal 23a could equal 2 and r could equal 19a could equal 3 and r could equal 15a could equal 4 and r could equal 11a could equal 5 and r could equal 7a could equal 6 and r could equal 3a could equal 7 and r could equal - 1It could be any of these and many, many more...is it the whole question?
A US 5 cent coin (a nickel) has a diameter of 21.21 mm -. That is 2.121 cm
The area of a semicircle is one-half the area of a circle. it is equal to (pi/2)r^2, where r is the radius.
R and > with a line under it (i can't do it on this website) and then C or R is greater than or equal to C