Diameter is twice the radius, so 15 cm.
The circum. = pi x diameter so divide circum. / pi = diameter
Area = 12.6 cm2Circumference = 12.6 cm
the area of a circle is pi times the radius squared. The diameter is 12, so the radius is 6 (half of the diameter). Therefore, the area is pi times 6 squared, which is 36 pi square centimeters. Also, if you want the answer in decimal, it's 113.09733552923255658465516179806 square centimeters.
The diameter of a circle whose area is 200.96 is: 16
The diameter of a circle whose circumference is 314 is about 1 (99.95).
The circumference of circle whose diameter is 10 is: 31.42 (diameter x Pi = circumference).
The approximate diameter of a circle whose circumference is 21cm is: 6.68cm
The circumference of a circle whose area is 16 times the area of a circle whose diameter is 1.4m is: 17.6 cm
The area of a circle whose radius is 19 centimeters is: 1,134 cm2