If the cylinder is cut in half along the side it is still a cylinder. If the cylinder is cut in half along one of the circular faces it is a horizontal cylindrical segment, which would look like a pig trough not hollowed out.
A sphere that's cut in half o.o
It is the distance measured round its edge. multiply the radius (half the distance across it) by 3.14159
Half a century or five decades
a "Split-level."
Half of 15 feet is 7.5 feet. Simple math, darling. Don't overthink it. Just chop that number in half and call it a day.
A cylinder? A cylinder is still a cylinder regardless of how long it is.
Another cylinder
A cylindania.
cylindania
A cylindania.
The radius of a cylinder is half the thickness of its circular cross section.
It is half the thickness (diameter) of the circular cross-section of the cylinder.
If you have a physical cylinder to measure, measure the "width" of the circle that is the cross section of the cylinder. That is the diameter, Half the diameter is the radius.
You call that an oil can or a barrel.
A cylinder is a 3-dimensional object. A pyrimad is a typographic error!
cousin
You call them a person.