se aplica teorema inaltimii, teorema catetelor, Pitagora
randul 1
BC=16
DC=4
BD=16-4=12 cm
AD=√12x4=√48=4√3
AB=√12x16=√192=8√3
AC=√4x16=√64=8
randul 2
AB=6
AC=8
BC=√(6²+8²)=√(36+64)=√100=10
AD²=(6²-BD²)
AD²=8²-(BC-BD)²
36-BD²=64-100+20BD-BD²
36=64-100+20BD
20BD=72
BD=3,6
DC=10-3,6=6,4
randul 4
BD=4
DC=9
BC=4+9=13
AD=√4x9=6
AB=√4x13=√52
AC=√9x13=3√3
