The radius of a circle is half the diameter.
with a big tape measure
If you know the radius, double that to get diameter. If you have neither radius or diameter, then measure around the outside.
Not normally
I have No Clue........
Internal diameter.
The radius of a circle is half the diameter.
Given an atom with diameter of 100 picometers, the diameter in inches is 4 nano inches.
Measure its diameter.
well, if you want to measure the length, just stretch the tape and measure it. If you want to measure the diameter, measure the circumference of the screw, then divided by 3.1415, then you will get the diameter.
how do you measure diameter
with a big tape measure
If you know the radius, double that to get diameter. If you have neither radius or diameter, then measure around the outside.
By the diameter.
Coins
Not normally
I have No Clue........