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Q: What is the relationship between the number of polygon sides and the number of triangles formed?

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21

it should make a square leaned over

The will form a rectangle.

120 triangles.

10 triangles....

Related questions

Two triangles can be formed by the diagonals of one vertex of a four-sided polygon.

18 triangles

The number of triangles formed by the diagonals of a 21 sided polygon is C(21,3) = 21x20x19/3x2x1 = 1,330.

13 triangles will be formed

In a polygon with n sides, the sum of the interior angles is given by (n-2) * 180 degrees. Each triangle has interior angle sum of 180 degrees. Therefore, the number of triangles that can be formed in a polygon is equal to (n-2) * 180 / 180, which simplifies to (n-2). In other words, the number of triangles is two less than the number of sides in the polygon.

square

A pyramid

It is: 8-2 = 6 triangles

98

pyramid

98

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