Math Trivia : Triangles on a circle

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There are eight points on the circumference at equal interval.
A triangle is made by choosing three points among eight.
How many kinds of triangle are made?










As 8 = 1 + 1 + 6 = 1 + 2 + 5 = 1 + 3 + 4 = 2 + 2 + 4 = 2 + 3 + 3, there are five kinds as shown below.