Question

ajutați. ma va rog plss repede toate 3 ex

Answer 1

1. P dreptunghi= 2(L+l)=2(8+6)=28dm
P^2=4*l
28=4*l
l=28/
l=7
A^2=l^2=7^2=49 dm

2. A=l*L
L=2l
2l*l=32
2l^2=32
l^2=16
L=8
l=4

P=2(L+l)=2(8+4)=24 cm...