An equilateral triangle.
pentagon
A regular 2D shape is called a "regular polygon." Regular polygons have all sides of equal length and all interior angles of equal measure. Examples include an equilateral triangle, square, and regular pentagon. These shapes exhibit symmetry and uniformity in their structure.
A square.
A shape with 8 equal sides is called a regular octagon.
A nine sided shape that is called a regular nonagon.
pentagon
A regular 2D shape is called a "regular polygon." Regular polygons have all sides of equal length and all interior angles of equal measure. Examples include an equilateral triangle, square, and regular pentagon. These shapes exhibit symmetry and uniformity in their structure.
A square.
hexagon
The shape is called a decagon. If all the sides and angles are the same, it is called a regular decagon.
A regular 5-sided shape is called a pentagon.
Regular polygons
A shape with 8 equal sides is called a regular octagon.
Six sided shapes are called hexagons. If all 6 sides are the same size, then the shape is called a regular hexagon.
A nine sided shape that is called a regular nonagon.
A regular fifty-sided polygon is called a pentacontagon.
A regular polygon