h in triunghiul echilateral are formula
[tex] \frac{l \sqrt{3} }{2} [/tex]
Deci la a : [tex]h = \frac{4 \sqrt{3} }{2} = 2 \sqrt{3} [/tex]
b. [tex] \frac{12 \sqrt{3} }{2} = 6 \sqrt{3} [/tex]
c. [tex] \frac{6 \sqrt{3} \times \sqrt{3} }{2} = \frac{6 \times 3}{2} = \frac{18}{2} = 9[/tex]
d. [tex] \frac{x \sqrt{3} }{2} [/tex]
