Which types of polygons are the faces of a tetrahedron? a. equilateral triangles b. regular hexagons c. squares d. regular pentagons

The answer is the option A, which is: A. Equilateral triangles.

The explanation for this answer is shown below:

By definition, a tetrahedron is a solid in three dimensions that has: six sides, four vertices and four triangular faces. These faces are equilateral triangles, which means that all the sides are equal and all the interior angles measure degrees.

The tetrahedron is also called "triangular pyramid".

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63