Explicație pas cu pas:
AC^2+AB^2= BC^2
AD^2=AC^2-CD^2=AB^2-DB^2
AC^2+AB^2= 36^2
AD^2=AC^2-6^2=AB^2-30^2
AC^2+AB^2= 1.296
AC^2-36=AB^2-900
AC^2=AB^2-900+36
AC^2=AB^2-864
AB^2-864+AB^2= 1.296
2AB^2= 1.296+864
2AB^2= 2.160
AB^2=2.160:2
AB^2=1.080
AD^2=AB^2-30^2= 1.080-900
AD^2=180
AD=√180=3√10
sper sa nu fi gresit la calcule.
