Răspuns:
a)BC=12 cm
AB=BC/2=12/2=6 cm
BC^2=AB^2+AC^2
12^2=6^2+AC^2
144=36+AC^2
AC^2=144-36
AC^2=108
AC=√108cm
b)BC=24cm
AC=CB/2
AC=12cm
c)AC=13 cm
AB=15 cm
BC^2=AB^2+AC^2
BC^2=13^2+15^2
BC^2=169+225
BC^2=394
BC=√394cm
d)AC=15cm
BC^2=15^2+12^2
BC^2=225+144
BC=√369cm