Question 1177800
Formula:

        
{{{L = sqrt(a*b*(a+b+c)(a+b-c)) / (a+b)}}}


        Where,

{{{L }}}= Length of Angle Bisector
{{{a = 9}}}
{{{b = 12}}}
{{{c = 15}}}


{{{L = sqrt(9*12*(9+12+15)(9+12-15)) / (9+12)}}}


{{{L = sqrt(108*36*6 )/ 21}}}


{{{L = sqrt(23328) / 21}}} ....{{{23328 = 2*(4)^2*(27)^2}}}


{{{L = sqrt(2*(4)^2*(27)^2) / 21 }}}


{{{L = (4*27sqrt(2)) / 21 }}}


{{{L = (4*cross(27)9sqrt(2)) / cross(21)7 }}}


{{{L = (4*9sqrt(2)) / 7 }}}


{{{L = (36sqrt(2))/7}}}