in triunghiul dreptunghic ABC stim:
unghiul ABC=90gr
AB=0.75*BC
AC=10cm
Conform Pitaroga: [tex] AB^{2} + BC^{2} = AC^{2} [/tex]
Adica: (0.75*BC)^2+BC^2=100
BC^2(0.75*075+1)=100
BC^2=100/(1.5625)=>BC=Radical din64=8
BC=8=>AB=0.75*8=6
deoarece este dreptunghi:
AB=CD
BC=AD
Perimetrul=6+6+8+8=28
