a)How many diagonals can be drawn from a vertex of a 20 sided polygon?
b) How many triangles can be made by these diagonals?
c)What is the sum of the angles of this polygon ?
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a) 170 diagonals
b)There are combinations of the four diagonal endpoints. For each set of four endpoints, there are four triangle configurations.
c) The interior angles in a regular polygon are always equal to each other. Therefore, to find the sum of the interior angles of a polygon, we use the formula: Sum of interior angles = (n − 2) × 180° where 'n' = the number of sides of a polygon
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