A regular pentagon (5 sides)
A solid with a regular polygon for each face is known as a perfect solid.
Chiliagon has 1000 sides. (In geometry, a chiliagon is a polygon with 1000 sides. The measure of each angle in a regular chiliagon is 179.64°.)
The measure of each interior angle of a fifteen sided regular polygon, a pendedecagon, is 156o.
It is best described as a regular 10 sided polygon or as a regular decagon.
A regular hexagon.
hexagon
Each of the sides are the same length, and each of the internal angles are identical.
If a polygon's sides are all of equal length, it is known as a regular polygon. (The measure of each of its angles will be the same as well)
A regular hexagon which has 6 equal sides and 6 equal angles.
5 sides, a regular pentagon.
Only if it is a regular polygon.
A 13 sided regular polygon
What's Greek for 18?
A regular pentagon (5 sides)
A regular polygon with each interior angle measuring 120 degrees is a hexagon.
A solid with a regular polygon for each face is known as a perfect solid.