at the end of the circle.
A segment with end points on a circle is a chord.
Longitude
An Chord is a segment with end points on the circle. Your welcome. :)
A circle as such does not have a start point nor an end point. We do however have to start at one point and end at the same point when we draw a perfect circle, but after it is drawn, the actual circle does not have a start nor an end. We might be able to see where we started and ended but this is of no significance to the actual start/end point of the circle as the circle itself does not have any.
The center of a circle is called the origin. It is a point at one end of a radius, the other end of which defines the circumference of the circle.
The radius
A segment with end points on a circle is a chord of that circle.
Gold Circle ended in 1989.
South Circle ended in 1997.
Callenish Circle ended in 2007.
Chalk Circle ended in 1990.