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There are: 0.5*(302-(3*30)) = 405 diagonals
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How many diagonals are in a 11- gon?
There are 44 diagonals in an 11 sided undecagon
How many diagonals in a 15 gon?
1/2*15*(15-3) = 90 diagonals.
How many diagonals does a 16 gon has?
104 16x ((16-3)/2) =104
What polygon has 209 diagonals?
22-gon
How many diagonals does a 17-gon have?
A n sided figure has 1/2 n(n - 3) diagonals → a 17-gon has 1/2 x 17 x (17 - 3) = 1/2 x 17 x 14 = 119 diagonals
Related questions
How many diagnals for a 30-gon?
405 diagonals
How many diagonals are in a 24-gon?
252 diagonals
How many diagonals does a 33-gon have?
It has 495 diagonals.
How many diagonals are in a 17-gon?
There are 119 diagonals.
How many diagonals of a 12-gon have?
It has 54 diagonals
How many diagonals are in a 20-gon?
170
How many diagonals does the 13 gon?
78
How many diagonals are in a 11- gon?
There are 44 diagonals in an 11 sided undecagon
How many diagonals in a 15-gon?
0.5*(152-45) = 90 diagonals
How many diagonals does a 20 gon has?
A 20 sided polygon has 170 diagonals
How many diagonals in 25-gon?
There are 275 diagonals in a 25 sided polygon
How many diagonals are in a 39-gon?
39*36/2 = 702 diagonals.
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