a)AD=DC=CB=BA=24cm
In,Δdr.CBE,avem,tgBEC=cat.opusa/cat.alat.=BC/BE=2=>BE=12cm
Cu,t.Pit.,aflam,ipotenuza,CE
CE²=BC²+BE²
CE²=576+144
CE²=720
CE=√720=12√5
=>Perim.terenului=24x3+12+12√5=84+12√5
Daca,√5≈2,23=>P=84+26,83≈110,83
b)Distanta,de,la,A,la,CE,este,chiar,diagonala,in,patratul,ABCD
AC=24√2
c)Aici,las,pe,altii...nu-mi,pica,fisa...