question_answer

Which among the following is true about a regular tetrahedron?      

A)  All the faces of a regular tetrahedron are of right angled triangle.         

B)  The lateral surface area of a regular tetrahedron is \[\frac{2\sqrt{3}}{4}{{a}^{2}}\] when 'a' is the                           

C)  The total surface area of a regular tetrahedron = 3a2 (when 'a' is the edge)

D)  Volume of regular tetrahedron is \[\frac{{{a}^{3}}}{3\sqrt{2}}\]

E)  None of these