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What is a polyhedron with equilateral triangle faces?
It_is_a_triangular_prism.">It_is_a_triangular_prism.">It is a triangular prism.* * * * *While a triangular prism can have equilateral triangle faces, it has more faces that are quadrilateral (or rectangular).A polyhedron with only equilateral triangular faces could be a tetrahedron, an octahedron in the form of a square based dipyramid, or an icosahedron.
Is an icosahedron a semi-regular or regular polygon?
An icosahedron is in fact not a polygon at all, but a polyhedron. As a polyhedron it is regular however. The regular icosahedron is one of only five possible regular polyhedra. It has 20 faces, each of which is an equilateral triangle.
Are all parrellelograms rectangles?
No. Only some parallelograms are rectangles. But all rectangles are parallelograms.
Does a triangle have faces?
No. A triangle is a two-dimensional polygon (flat figure). It has sides that consist of three line segments, with an interior area. Only a three-dimensional form (polyhedron) can have faces. Triangles serve as faces for any number of polyhedrons, such as pyramids.
What is the highest vertex of a polyhedron?
It may be called an apex, but that is really only appropriate for a simple convex polyhedron.
