The diameter is a straight line measured from the edge of the circle to the opposite edge passing through the center point
No. "pi" is the 'ratio' of circumference to diameter of a circle. It doesn't care what the unit is,just as long as both are measured in the same unit.
(2*pi*radius2) + (diameter*pi*height) measured in square units
It's called the "circumference" of the circle. It's equal to (pi) times (the circle's diameter).
It could be any value in the range (0, 48) inches, depending on how eccentric the octagon was and which of its diameters was measured. For a regular octagon, the diameter is 31.4 inches (approx).
The diameter is measured using a tape measure.
Diameter.
Hail is typically measured in terms of its diameter. The sizes of hailstones can range from a few millimeters to several inches in diameter.
Tube is measured by outside diameter, pipe is measured by inside diameter.
Cells are typically measured in micrometers
gauge
When carefully measured, it's found to be precisely 30.2 .
Wire diameter is measured in millimetres (mm)
It is measured by length and diameter in millimeters. It is also "measured" by the quality of the cork itself.
Thread series cover designations of diameter/pitchcombinations that are measured by the number of threads per inch (TPI) applied to a single diameter
Table saws are usually measured by the diameter of blade, -ie 10" or 12" .
Hail is measured by its diameter, typically in millimeters. The larger the diameter of the hailstones, the more severe the storm that produced them. Hail size is categorized on a scale ranging from pea-sized (less than 1/4 inch) to grapefruit-sized (4 inches or more).