Răspuns :
P dreptunghi= 2l+2L
2l+2L=30cm
2(l+L)=30cm
l+L=15cm |
-nr sunt consecutive | => l=7cm,L=8cm
2l+2L=30cm
2(l+L)=30cm
l+L=15cm |
-nr sunt consecutive | => l=7cm,L=8cm
P=30cm
L si l=> 2 nr. cons.
...........................
L=? l=?
P=2*(L+l) => L+l=30:2...=>L+l=15cm
L>l..=> 15:2=7 rest 1....=>L=7+1...= L=8cm ...=>
l= 15-8...=>l=7cm
verificare
P=2*(8+7)
P=2*15
P=30cm
L si l=> 2 nr. cons.
...........................
L=? l=?
P=2*(L+l) => L+l=30:2...=>L+l=15cm
L>l..=> 15:2=7 rest 1....=>L=7+1...= L=8cm ...=>
l= 15-8...=>l=7cm
verificare
P=2*(8+7)
P=2*15
P=30cm