It has 40 diagonals.Improved Answer:-Using the formula for diagonals of a polygon: 0.5*(442-132) = 902 diagonals
There are 275 diagonals in a shape with 25 sides. The formula is n*(n-3)/2
It must have 19 sides to comply with the formula:- 0.5*(192-(3*19)) = 152 diagonals
Using the formula 0.5(n^2 -3n) whereas n is number of sides, altogether there are 104 diagonals in a 16 sided polygon
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90
There are 560 diagonals by using the diagonal formula
It has 170 diagonals by using the diagonal formula
90. Number of diagonals = number_of_sides × (number_of_sides - 3) ÷ 2 → For a Pentadecagon which has 15 sides: Number of diagonals = 15 × (15 - 3) ÷2 = 15 × 12 ÷ 2 = 90
Using the diagonal formula: 0.5*(182-54) = 135 diagonals
Using the formula: 0.5*(n2-3n) it has 54 diagonals
Using the formula: 0.5*(142-42) = 77 diagonals
It has 40 diagonals.Improved Answer:-Using the formula for diagonals of a polygon: 0.5*(442-132) = 902 diagonals
It has 10 sides because using the formula 0.5*(102-30) = 35 diagonals
Using the formula: 0.5*(64-24) = 20 diagonals
You can find the number of diagonals in a polygon using the formula n(n-3)/2, where n is the number of sides. Therefore an 11 sided polygon has 44 diagonals.
A Pentadecagon had 15 sides