Question

in seara asta daca se poate multumesc anticipat​

Answer 1

Răspuns:

Explicație pas cu pas:

DE║ BC

       ↓

Δ ADE ≈ Δ ABC

          ↓

AD/AB= 6⁽⁶/30⁽⁶= 1/5

AD/AB= DE/BC=AE/AC= 1/5

DE/BC= 1/5

4/BC= 1/5

BC= 4*5

BC= 20 cm

-

AE/AC= 1/5

5/AC= 1/5

AC= 5*5

AC=25 cm

-

P= AB+BC+AC

P= 30+20+25

P= 75 cm ( B)