Question

Calculati perimetrul rombului ABCD in urmatoarele cazuri:
Aabcd=50cm patrati si m(A)=30 grade

Answer 1

Aromb=l^2 x sin A
50 = l^2 x$\frac{1}{2}$
l^2=50 :$\frac{1}{2}$
l^2=50x2
l=$\sqrt{100}$
l=10
Promb=4l
          = 40cm