1)d(B,AC)=24 este inaltimea din B
AC*d/2=252
AC=252x2/24=21
2)AD=39 rezulta BC=78
Cu Pitagora [tex]AB^{2} =BC^{2} - AC^{2} =4788[/tex]
AB=[tex]6 \sqrt{133} [/tex]
A=36x6[tex] \sqrt{133} [/tex]:2=108[tex] \sqrt{133} [/tex]
3)Duci inaltimea AD si afli cu Pitagora AD=40^2-24^2=32^2
AD=32
A=48x32:2=768