how many diagonals can be drawn from a vertex of a 20 sided polygon
how many triangles can be made by these diagonals
what is the sum of all the angles of this polygon
give full explanation
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Answer:
In a 20-sided polygon, the total diagonals are = 20(20-3)/2 = 170 diagonals
Step-by-step explanation:
Another way to express the general rule for the total number of diagonals is to think about the number of diagonals that can be drawn from each vertex in a polygon. That is "3" less than the number of sides. Therefore, for a 20-sided polygon, there will be 190 lines and 170 diagonals.
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