Question

please answer this 20 points and i already know the answer but i just want to conform so don't answer wrong

SOLVE USING HERONS FORMULA

Answer 1

BD=
${12}^{2} + {5}^{2} = 169 \\ so \:$
BD=13
in triangle BCD=S=
$\frac{12 + 5 + 13}{2}$
s=15
$\sqrt{15(15 - 12) (15 - 5)(15 - 13)}$
$\sqrt{900} = 30$
similarly area of BAD=35.5
so total area 35.5+30=65.5