ΔABC: P=AB+BC+AC=AB+2BD+AC=2*(AB+BD)=64
AB+BD=64:2=32
Δ ABD; P=AB+AD+BD=AD+(AB+BD)=AD+32=52
AD=52-32=20
ΔABC: P=AB+BC+AC=AB+2BD+AC=2*(AB+BD)=64
AB+BD=64:2=32
Δ ABD; P=AB+AD+BD=AD+(AB+BD)=AD+32=52
AD=52-32=20