Oh, what a delightful question! To find the radius of a circle, we simply divide the diameter by 2. So, if the circle is 24 feet across, the radius would be 12 feet. Just imagine all the happy little circles you can create with that radius!
None. A 12 foot diameter is the length across a circle: it is a linear distance, not an area.
You don't. Cubic feet is a measure of volume. Volume is a property of 3-dimensional objects. A circle is a two-dimensional object, it does not have a volume. You could find the cubic feet in a sphere, but not in a circle.
There is no such word as circunfrince. You have a tautological question so that the circumference of a 12 feet circumference circle is ... 12 feet!
The circumference of a circle that has a radius of 12 feet is about 75.4 feet.
The center circle is 12 feet by 12 feet and is 38 feet away from the side line.
Closely approximate to 12 and 5/12 times 3 and one seventh ie 149/12 x 22/7, call it 39 feet and quarter of an inch.
The volume of a cube with side lengths of 12 feet is: 1,728 cubic feet.
The volume of a cylinder that is 12 feet long but has a radius of 5 feet is: 942 cubic feet.
The volume is 150.8 cubic feet.
The volume is 6*12*9 = 648 cubic feet.
The volume of a cylinder with 6 feet as the diameter and 12 feet as the height is 339.29 cubic feet.