A pentagon.
pentagon
It is a dodecagon which has 12 sides Check: 0.5*(144-36) = 54 diagonals
It is an undecagon which has 11 sides Check: 0.5*(112-33) = 44 diagonals
The polygon with 5 diagonals is a heptagon. A heptagon has seven sides, and the formula for calculating the number of diagonals in a polygon is given by ( \frac{n(n-3)}{2} ), where ( n ) is the number of sides. For a heptagon, substituting ( n = 7 ) yields ( \frac{7(7-3)}{2} = 5 ) diagonals.
There is no such polygon that has 95 diagonals because a 15 sided polygon has 90 diagonals and a 16 sided polygon has 104 diagonals.
A polygon that has 209 diagonals will have 22 sides and it's perfectly acceptable to call it a 22-agon.
There is no formula for how many sides there are in a polygon; the name of the polygon shows how many sides it has.
There are 14 diagonals in a septagon. Another name for a septagon is heptagon. This is a seven-sided polygon. To figure the numbers of diagonals, you can use the formula 1/2 x [n x (n-3)], where n is the number of sides.
quadrilateral
A polygon with 3960 sides is called a 3960-gon. The number of sides in a polygon can be simply referred to by its name, so a polygon with 3960 sides has exactly 3960 sides.
polygon
no you go by how many sides it has