Question

Un romb are lungimea laturi de 3cm, iar un unghi de 30 de grade.Aria rombului este de

Answer 1

l=3 cm
m(∡A)=30°
A= l² ×sinx
A=3² × sin 30°
A=9 × $\frac{1}{2}$ 
A=$\frac{9}{2}$
A= 4,5 cm²

Answer 2

[tex]A_romb=l^2*sin(30)\\ A_romb=3^2* \frac{1}{2} \\ A_romb=9* \frac{1}{2} \\ A_romb= \frac{9}{2} \\ A_romb=4,5cm^2[/tex]