In triunghiul ABC dreptunghic,(∡A)=90°,se duce AD⊥BC,D∈(BC)

c.Daca AB=2,4 m,BC=30dm,AC=18 dm,calculati AD.
d) Daca Ad=28,8 cm,AB=36 cm ,Aabc=864 cm patrati ,calculati AC si BC