In geometry, a pentadecagon or pentakaidecagon or 15-gon is a fifteen-sided polygon. A regular pentadecagon is represented by Schläfli symbol {15}. A regular pentadecagon has interior angles of 156 °, and with a side length a, has an area given by.

In geometry, a polygon is traditionally a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed chain. These segments are called its edges or sides, and the points where two of the edges meet are the polygon's vertices (singular: vertex) or …

Poly- means "many" and -gon means "angle". A stop sign is an example of a regular polygon. It has eight equal sides and angles, making it a regular octagon. Can you think of more polygons in real life? A regular polygon has all angles equal and all sides equal. Otherwise it is irregular.

A pentadecagon or quindecagon or 15-gon is a shape with 15 sides and 15 corners. All sides of a regular pentadecagon are the same length. Each corner is 156°. All corners added together equal 2340°. The amount of space a regular pentadecagon takes up …

Apr 1, 2025 · A 15-sided polygon, sometimes also called the pentakaidecagon. For a regular pentadecagon with side length 1, the inradius , circumradius , and area are (1)

Dec 24, 2022 · Join all vertices to the midpoint of the 15-agon. This will form 15 congruent isosceles triangles with an angle of 360° ÷ 15 = 24° at the centre and a base of length equal to that of the...

Jan 14, 2019 · The sum of the interior angles of a 15-gon is 2340 degrees. This is calculated using the formula I = 180(n - 2), where n is the number of sides. By plugging in 15 for n, we find that I = 2340 degrees.

Nov 3, 2022 · There are: 0.5* (15^2 -3*15) = 90 diagonals in a 15-agon polygon. Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site …

The 15 interior angles of 15-agon add up to 2340 degrees. Tags Geometry Subjects. Animals & Plants Arts & Entertainment Auto Beauty & Health Books and Literature Business Electronics Engineering & Technology Food & Drink History Hobbies Jobs & Education ...