a) (BC)²+15²=17²
BC=8 cm
Obw=2*15+2*8=30+16=46cm
P=15*8=120 cm²
b) (AB)²+18²=30²
AB=24 cm
Obw=2*18+2*24=36+48=84 cm
P=18*24=432 cm²
c)(AB)²+16²=24²
AB=8√5 cm
Obw=2*8√5+2*16= 16√5+32 cm
P=8√5 *16=128√5 cm²
