In geometry, a tetrahedron (plural: tetrahedra or tetrahedrons) is a polyhedron composed of four triangular faces, three of which meet at each corner or vertex. It has six edges and four vertices. The tetrahedron is the simplest of all the ordinary convex polyhedra and the only one that has fewer than 5 faces. The tetrahedron is the three-dimensional case of the more general concept of a Euclidean simplex.
6 Vitamins And Minerals That Boost Brain Power. 1  1.Thiamine (B1) 2  2. Folic acid (B9) 3  3. Ascorbic acid (vitamin C) 4  4. Calcium. 5  5. Magnesium. 6  6. Zinc. 7  Also Watch A Video On: Top 4 Healthy Foods to Boost Your Brainpower. 8  Conclusion.
1 Vitamin K is an important fat-soluble vitamin that plays critical roles in protecting your heart, building your bones, optimizing your insulin levels, and helping your blood to clotproperly. 2  Vitamin K is an important adjunct to vitamin D, and nearly everyone tested is deficient in both.