Question

Mă ajutați va rog frumos

Answer 1

3) 5/a=b/10 ...ab=50

4) 1/2+1/2=2/2=1

5) Al=48 cm^2
At=80 cm^2

At=Al+2Ab
80 cm^2=48 cm^2 + 2Ab
2Ab=80 cm^2-48 cm^2
2Ab=32 cm^2
Ab=32 cm^2/2
Ab=16 cm^2 {Ab--Aria bazei}

Ab=l^2
16 cm^2=l^2
l=4 cm