\alpha=90^0
beta=60 h=7 cm
CD =h
AD=x
DB=y
AB=x+y
tg30=\frac{7}{x}
\frac{\sqrt3}{3}=\frac{7}{x}
x=\frac{21}{\sqrt3}=7\sqrt{21}
tg60=\frac{7}{y}
\sqrt3=\frac{7}{y}
y=\frac{7}{\sqrt3}=\frac{7\sqrt3}{3}
AC=m
Bc=n
sin30=\frac{7}{m}
\frac{1}{2}=\frac{7}{m}
m=14
sin60=\frac{7}{n}
\frac{\sqrt3}{2}=\frac{7}{n}
n=\frac{14\sqrt3}{3}
Obw=AB+BC+AC=
=7\sqrt{21}+\frac{7\sqrt3}{3}+14+\frac{14\sqrt3}{3}=
=\sqrt{21}+7\sqrt3+14