Răspuns :
[tex] \frac{a}{4} = \frac{5}{2} [/tex]
[tex]2a = 5 \times 4[/tex]
[tex]2a = 20[/tex]
[tex]a = \frac{20}{2} [/tex]
[tex]a = 10[/tex]
[tex]2a = 5 \times 4[/tex]
[tex]2a = 20[/tex]
[tex]a = \frac{20}{2} [/tex]
[tex]a = 10[/tex]
[tex] \frac{a}{4} = \frac{5}{2} \\ a = \frac{4 \times 5}{2} = \frac{20}{2} = 10[/tex]
coroana?