154 cm2
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The circum. = pi x diameter so divide circum. / pi = diameter
Area = 12.6 cm2Circumference = 12.6 cm
A sphere with this volume has a diameter of 9.1416 cm, a surface area of 262.54 square cm and a circumference of 28.719 cm.
The approximate diameter of a circle whose circumference is 21cm is: 6.68cm
The area of a circle whose diameter is 12 inches is: 113.1 square inches.