Răspuns :
AB||CD=>AOB asemenea COD AO/OC=OB/OD=AB/CD
AO/OC=48/30=8/5 AO+OC/OC=8+5/5 AC/OC=13/5=>52/OC=13/5=>OC=52•5/13=20cm=>AO=52-20=32cm
OB/OD=48/30=8/5 OB+OD/OD=8+5/5 BD/OB=13/5 65/OD=13/5=>OD=65•5/13=25cm=>OB=65-25=40cm.
Răspuns:
Explicație pas cu pas:.......................................