Răspuns:
Explicație pas cu pas:
P = 24 ⇔ 4l = 24 → l = 24 : 4 = 6 cm
[tex]A = 2(l \times l \times \frac{sin C }{2} ) = 2(36 \times \frac{ \frac{ \sqrt{3} }{2} }{2} ) \\ [/tex]
[tex] A= 2(\not{ 36} \times \frac{ \sqrt{3} }{\not{4}} ) = 2 \times 9 \sqrt{3} = \boxed{18 \sqrt{3}cm {}^{2} } \\ [/tex]
