Which regular polygons could be used to make regular and semi-regular tessellations? Check all that apply.equilateral trianglesquareregular pentagonregular hexagonregular octagonregular nonagonregular dodecagon

Equilateral triangles, squares, and regular hexagons each make a regular tessellation by themselves. Regular octagons can be used with squares in a semi-regular tessellation, and regular dodecagons can be used with equilateral triangles. Regular pentagons and nonagons do not fit into a regular or semi-regular tessellation because their interior angles cannot combine with the angles of other regular polygons to make exactly 360° at each vertex.

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