A pentadecagon has 15 sides. (the prefixes pent=5, and deca=10)15
45
It has 1,345,890 diagonals
Pentadecagon, Quindecagon, PentakaidecagonA polygon with fifteen sides can be called a pentadecagon.
The name of a 15 sided polygon is Pentadecagon.
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
Number of diagonals in a polygon with n sides is n*(n-3)/2 A pentadecagon has 15 sides, so n = 15 Number of diags = 15*12/2 = 90
A Pentadecagon had 15 sides
A pentadecagon has 15 sides. (the prefixes pent=5, and deca=10)15
45
Fifteen.
15
i hate maths kate barney
It has 1,345,890 diagonals
Pentadecagon, Quindecagon, PentakaidecagonA polygon with fifteen sides can be called a pentadecagon.
The name of a 15 sided polygon is Pentadecagon.
it is called a pentadecagon ok? its like pentagon but its a pentadecagon.