A = 254.47 cm2
radius = 18/2 = 9 cm
12.99 x 7.087
I do not know the diameter of a US dime and, to be honest, do not care. However, for the benefit users of Answers.com, firstly, not everyone knows the size of a dime and secondly I do not for a moment believe a US coin would be 18 centimetres = 7 inches (approx) in diameter! <><><>><>><> 18 centimeters equals approximately 7.09 inches. My hand is of average size and it is about 18cm long.
The inches in a diameter = 2 X inches in the radius. Or, inches in a diameter = inches in circumference / pi
A = 254.47 cm2
7.0866 inches
18 pi cm
About 7.0866141732 inches.
radius = 18/2 = 9 cm
7 inches
9 cm (r = d/2)
12.99 x 7.087
180cm is 70.87 inches.
I do not know the diameter of a US dime and, to be honest, do not care. However, for the benefit users of Answers.com, firstly, not everyone knows the size of a dime and secondly I do not for a moment believe a US coin would be 18 centimetres = 7 inches (approx) in diameter! <><><>><>><> 18 centimeters equals approximately 7.09 inches. My hand is of average size and it is about 18cm long.
The inches in a diameter = 2 X inches in the radius. Or, inches in a diameter = inches in circumference / pi
What is a "8 inch ball" ? Is 8 inches the diameter ? Then its diameter is 8 inches. Is 8 inches the radius ? Then its diameter is 16 inches. Is 8 inches the circumference ? Then its diameter is about 2.546 inches (rounded).