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Cerbandanut
a fost răspuns

1.L=24cm;l=4/7L;P=? 2.P=56cm;L=21cm; l=? .3.P=56 cm l=13L=?

Răspuns :

L = 24
l = 4/7 * 24 
P = 2 * (24 + 4/7*24) = 48 * 11 / 7 = 75.43

P=56 = 2 *(L + l)
L = 21
L + l = 56 :2 = 28
l = 28 - 21
l = 7

l = 13
L+l = 28
L = 28-13
L = 15


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