It is half of the diameter or radius = diameter/2
"Diameter" is a noun.
Diameter is a noun.
The diameter is the width of the widest part, where the circumference is greatest.
A line segment or a chord is not a part of a circle.
The diameter
There isn't a specific diameter. The thicker the wire the more current it can convey. This diameter will be part of your calculations for your circuit.
diameter
That depends what part of the circle the 22 units is the measure of - if this is the perimeter, divide it by pi to get the diameter.
From the center to an outside part. Half the diameter
diameter
Diameter, cord, radious.