A polygon has 90 diagonals how many triangles can be formed through vertices of a polygon
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There are n(n-3)/2 diagonals in a n sided polygon
To find the diagonals we need to set the formula equal to 90 ans solve for n
n*(n - 3)/2 = 90
n*(n - 3) = 180
Substitute n from the answer choices.
n = 15.
Hope this answer helps you
If it did kindly mark the answer as brainliest
Thank you
There are n(n-3)/2 diagonals in a n sided polygon
To find the diagonals we need to set the formula equal to 90 ans solve for n
n*(n - 3)/2 = 90
n*(n - 3) = 180
Substitute n from the answer choices.
n = 15.
Hope this answer helps you
If it did kindly mark the answer as brainliest
Thank you
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