Only three regular polygons can tessellate in a plane.

Define tessellation

Name the three regular polygons

Explain why a regular polygon cannot form a tessellation.

Explain why only these three can form a tessellation.

Repeaterd use of figures of one kind or more to cover a plane without gaps and without overlaps is called tessellation.

only equilateral triangles squares and regular hexagons can form tessellation.

it is because each of their interior angles should be a factor of 360°. only these 3 kinds satisfy this.