2014 · Q67
How many equilateral triangles can be formed by joining any three vertices of a cube?
Elementary MathematicsGeometry: Lines, Angles and Triangles
- A0
- B4
- C8
- DNone of the above
Explanation
The 8 alternate-vertex triples (face diagonals as sides), forming two inscribed regular tetrahedra, give 8 equilateral triangles.