Because it's a chord not a diameter.
Yes but a chord cannot be bigger than the circle's diameter which is its largest chord.
You cannot. If you rotate the circle around its centre, the lengths of the radius and chord will remain the same but the coordinates of the chord will change.
Unless the chord is the diameter, there is no way to measure the radius of the circle. This is because the radius is in no way dependent on chord length since circles have infinite amount of chord lengths.
Different pools have different proportions.
Because it's a chord not a diameter.
Yes but a chord cannot be bigger than the circle's diameter which is its largest chord.
Sure. Any chord that passes through the center of the circle is also a diameter. Chords can have many different lengths, but a diameter is the longest chord.
Yes, any length - from virtually zero to that of the diameter.
When they have the same chord lengths
You cannot. If you rotate the circle around its centre, the lengths of the radius and chord will remain the same but the coordinates of the chord will change.
Unless the chord is the diameter, there is no way to measure the radius of the circle. This is because the radius is in no way dependent on chord length since circles have infinite amount of chord lengths.
That does not matter. There are different events which consist of different lengths. You just have to place 1st in an event.
Different pools have different proportions.
There are lots of different models with different lengths.
Different schemes have different id numbers of different lengths.
A marker is not a specific length - different markers can have different lengths.