In the US, a billiards ball or pool ball is 2.25 inches in diameter. This is 1.125 for its radius. The only exception is the oversize cue ball, which is 2.375 inches in diameter.
10 inches
A soccer ball has a larger radius than a baseball, so it has more surface area.
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).
8.86683 square inches. (Area=4 X pi X radius squared) diameter of ball = 1.68 inches.
In the US, a billiards ball or pool ball is 2.25 inches in diameter. This is 1.125 for its radius. The only exception is the oversize cue ball, which is 2.375 inches in diameter.
10 inches
The diameter would be 16 inches because the diameter is twice the radius.
7776*pi cubic inches
First find the radius by dividing 28 by 2*pi which is 4.456338407. Surface area = 4*pi*4.4563384072 = 249.5549508 or about 250 square inches.
Its usually defined by the diameter of the ball, like an 11 inch disco ball would have a diameter of 11 inches, not a radius of 11 inches.
The size of a regulation volleyball depends on if it is used for indoor or beach volleyball. An indoor ball has the radius of about 21 centimeters, and a beach ball has a radius of about 21.7 centimeter.
There are actually different sized footballs, but the most commonly distributed soccer ball in the US is 27-28 inches, because it has become the iconic version of the soccer ball since 1971.
The radius is 6 inches.
A soccer ball has a larger radius than a baseball, so it has more surface area.
Soccer ball
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).