Sagot :
Answer:
If the polygon has 'n' sides, then the number of triangle in a polygon is (n – 2). In a triangle there are three sides. In the adjoining figure of a triangle ABC we can observe that the number of triangles contained = 3 – 2 = 1.
Step-by-step explanation:
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Answer:
If we connect all vertices of a regular N-sided polygon we obtain a figure with = N (N - 1) / 2 lines. For N=8, the figure is: Careful counting shows that there are 632 triangles in this eight sided figure. All triangles are formed by the intersection of three diagonals at three different points.