Use the formula n(n-1)/2 --> 7(7-1)/2 = 7(6)/2 = 42/2 = 21.
A circle.
There is only one line (or line segment) that can be drawn between two distince points.
Chord.
A straight line segment can be drawn joining any two points.
A cord of a circle is any line segment connecting any two unique points on the curve. Any cord drawn through the center of the circle will be a diameter of the circle. These cords will be the longest cords that can be drawn, and any one of them can bisect the circle into two identical parts.
5
66 ( 12 nCr 2 )
twenty
A circle.
One
There is only one line (or line segment) that can be drawn between two distince points.
line segments
21
The answer is 1225.
Chord.
A straight line segment can be drawn joining any two points.
the difference is california kingz