An 18-sided polygon is called an octadecagon or an octakaidecagon.
A regular octdecagon (18 sided geometric figure) was internal angles of 160 degrees.
If its a regular 9 sided polygon then the exterior angles are 40 degrees.
The central angle of a n-sided regular polygon = 360 degrees / n. Hence, the central angle of a 15-sided regular polygon = 360 degrees / 15 = 24 degrees ============================
Each interior angle measures 160 degrees
The interior angle of an octdecagon, an 18 sided regular polygon, is 160o.
If you say this shape is 18 sided i would guess it has 18 sides. ;)
56
A square is a regular four-sided polygon.
The name of a 18 sided polygon is Octadecagon.
20
A five-sided polygon is called a pentagon. A regular five-sided polygon is simply called a regular pentagon
The name of a 18 sided polygon is Octadecagon.
A 6 sided hexagon polygon can be regular or irregular.
An 18-sided polygon is called an octadecagon or an octakaidecagon.
20
A regular polygon has equal length sides while a polygon does not have to have equal sides.