document.write( "Question 194949: What is the area and circumference of a circle with diameter 22 mm? \n" ); document.write( "
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What is the area and circumference of a circle with diameter 22 mm?\r
\n" ); document.write( "\n" ); document.write( "The area of a circle is pi times the radius squared, and the circumference
\n" ); document.write( "is pi times the diameter. Pi is the irrational number equal to approximately
\n" ); document.write( "3.14. The radius is half the diameter because it is the distance from the edge
\n" ); document.write( "of the circle to the center point of the circle. So the radius is
\n" ); document.write( "22/2=11 mm. The area is pi times r^2=3.14*(11 mm)^2=379.94 mm^2. The circumference is pi*d=3.14*22mm=69.08 mm.
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