Question

In triunghiul ABC dreptunghic,M(∡A)=90°,se duce AD⊥BC,D∈(BC)
a.Daca AB=8 cm,AC=6cm,AD=4,8 cm,calculati A ABC,BC
b.Daca AB=20 cm,BC=25 cm,AD=12 cm,calculati A ABC,AC
c.Daca AB=2,4 m,BC=30dm,AC=18 dm,calculati AD.

Answer 1

a) A ABC=C1*C2/2=8*6/2=24, BC PATRAT=AB PATRAT+AC PATRAT=36+64=100 -=>BC=10;;; b)A ABC=B*H/2=25*12/2=150; AC PATRAT=BC PATRAT-AB PATRAT=625-400=225=>AC=15; C) ARIA ABC=C1*C2/2=18*24/2=216 DM PATRATI=> ARIA ABC =B*H/2=>216=30*AD/2=>AD=216*2/30=14,4 DM