Three noncollinear points determine a triangle. How many different triangles are determined by 7 points in a plane, no three of which are collinear?
A)21
B)840
C)210
D)35

Name: Three noncollinear points determine a triangle. How many different triangles are determined by 7 points in a plane, no three of which are collinear? A)21 B)840 C)210 D)35
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Question

Quizplus · Accepted Answer

The number of triangles that can be formed by choosing 3 points out of 7 is given by the combination formula C(7,3) = 35.

Three Noncollinear Points Determine a Triangle