Is a pyramid a equilateral

A pyramid is not inherently equilateral; rather, it depends on the shape of its base. A pyramid can have various types of bases, such as triangular, square, or rectangular. If the base of the pyramid is an equilateral triangle, then it is referred to as a triangular pyramid or tetrahedron, but the pyramid itself as a geometric shape is not defined as equilateral. The term "equilateral" specifically describes shapes like triangles or polygons where all sides are of equal length.