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Alinaban531
a fost răspuns

Calculati perimetrul dreptunghiului cu lunginea de 35 cm stind ca latimea si lungimea subt durect proportionale cu 4 si 7 ajtt plzzz

Răspuns :

4+4+35+35 ..........
Linquis59

[tex]P=2(L+l)\\\\\\(L,l) d.p. (4,7)\\\\\frac{L}{4} =\frac{l}{7} \\\\L=4k\\l=7k\\\\\\L=35 cm\\4k=35\\k=\frac{35}{4} \\\\7k=\frac{245}{4} \\\\P=2(4k+7k)=2*(35+\frac{245}{4})=70+\frac{245}{2} = \frac{315}{2}[/tex]

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