Question 25
Ten points are marked around a circle, as shown.
(a) How many chords can be formed by joining any two of these points? (A chord is a line segment joining two points on a circle.)
(b) How many triangles can be formed by joining any three of these points?
(a) How many chords can be formed by joining any two of these points? (A chord is a line segment joining two points on a circle.)
(b) How many triangles can be formed by joining any three of these points?