Răspuns :
A=BC*AD/2
48=12*AD/2
AD=8
In ΔADB, mD=90, AD=8, BD=BC/2=6
AB²=AD²+BD²
AB²=64+36
AB²=100
AB=10
P=2*10+12=20+12=32
48=12*AD/2
AD=8
In ΔADB, mD=90, AD=8, BD=BC/2=6
AB²=AD²+BD²
AB²=64+36
AB²=100
AB=10
P=2*10+12=20+12=32