M.I. of a triangular section of base a and height h about an axis passing through its c.g. and parallel to base is
1
\(\frac{{{\rm{a}}{{\rm{h}}^3}}}{8}\)
2
\(\frac{{{\rm{a}}{{\rm{h}}^3}}}{12}\)
3
\(\frac{{{\rm{a}}{{\rm{h}}^3}}}{24 }\)
4
\(\frac{{{\rm{a}}{{\rm{h}}^3}}}{64}\)
5
\(\frac{{{\rm{a}}{{\rm{h}}^3}}}{36}\)