Problema Solution
Nine unique diagonals are drawn in a regular polygon. How many sides does it have?
Answer provided by our tutors
The number of diagonals of an n-sided polygon is:
n(n − 3) / 2
Since we know that the number of diagonals is 9 we have:
n(n − 3) / 2 = 9
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click here to see the equation solved for n
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n = 6
The regular polygon has 6 sides, it is a hexagon.