a pentadecagon
The name of a polygon with 15 sides is a pentadecagon
15 sides
15 cm * 6 sides = 90 cm perimeter
A pentadecagon has 15 sides. (the prefixes pent=5, and deca=10)15
It has 360/15 = 24 sides
The name of a polygon with 15 sides is a pentadecagon
A 15-sided figure is called a pentadecagon.
A pentagon is a 5-sided figure, and the perimeter is the sum of the lengths of all the sides. A pentagon with 15-inch sides, will have 5 x 15 inches = 75 inches as its perimeter.
pentadecagon
A Pentadecagon.
pentadecagon
Pentakaidecagon or Pentadecagon
pentadecagon (or quindecagon or pentakaidecagon) Some people call this a Fifteen a gon but that is not complete.
Perimeter of a triangle is given by: sum of the three sides =(10+15+18)cm =43cm Done.
306
Pentadecagon, although most mathematicians would use "15-gon."
A pentadecagon, which has 15 sides, can be analyzed for parallel lines by considering the sides. Each pair of opposite sides in a regular pentadecagon can be seen as parallel. Since there are 15 sides, the number of pairs of parallel sides is given by the formula ( \frac{n}{2} ) where ( n ) is the number of sides. Therefore, a regular pentadecagon has 7 pairs of parallel lines.