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Eusuntbibi1
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Va rog sa ma ajutati
DAU COROANA

Va Rog Sa Ma AjutatiDAU COROANA class=

Răspuns :

Corina7770
P = 2(L+l)
=> 2(L+l) = 240 /:2
=> L+l = 120
=> L+[tex] \frac{3}{5} [/tex] L = 120
=> [tex] \frac{5L+3L}{5} [/tex] = 120
=> [tex] \frac{8L}{5} [/tex] = 120
=> L = [tex] \frac{120 * 5}{8} [/tex]
=> L = 75

=> l = [tex] \frac{3}{5} [/tex] * 75 = 45
Bebedumi70
P=240m
l=3/5(L)...= ...l=240:2):(3/5+5/5)
.................................................
L=? l=?

L+l=240:2
L+l=120m
l=3/5(L)
L=5/5
3/5+5/5=8/5=120
l=120:8*3
l=15*3
l=45cm
L=120:8*5
L=15*5
L=75cm

verificare

P=2*(45+75)
P=2*120
P=240cm

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