The width, or the length of a circle are its diameter.
The diameter of a circle is the length of a straight line drawn through the center of the circle to its edges.Or, measure the circumference of the circle and divide by pi (3.14159).Or you can multiply the radius times twoTo get diameter you have to find the radius and then double it to get the diameter
You can either measure it, or calculate it if you know the diameter (radius = diameter / 2), or the circumference (radius = circumference / (2pi)).
The radius of a circle is half the diameter.
It is the length of the base of the semi-circle.
If you have only the arc length then you cannot find the diameter.
The answer depends on what information you are given. If you know the circumference, then divide by Pi and that is the diameter. Half of the diameter is the radius. If you don't know anything about the circle, you would need to measure and find the diameter.
With a ruler, or other suitable length measuring device. Measure the diameter (the widest part of the circle). The radius is half the diameter.
radius = diameter/2
Multiply the diameter by the constant pi.
The diameter is the length of a line touching both sides of the circle and passing through the centre. The radius is the length of a line from the centre to touching the circle, and is half the length of the diameter, the diameter then is twice the length of the radius > diameter = radius * 2 = 32 * 2 = 64