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QUESTION
What is the circumference of a circle with a radius of 9 cm?
##=56.52cm##
The formula for the circumference of a circle is ##=2 pi r##
The radius ##=9 cm##
circumference ##=2 pi r##
##=2 xx 3.14 xx 9##
##=6.28 xx 9##
##=56.52cm##
