Question

In triunghiul ABC, m(A)=90 grade, AD_I_BC, D apartine (BC), AD=12 cm, BD=6 cm. CD este: a) 12 cm b) 6 cm c) 28 cm d) 24 cm

Answer 1

teorema inaltimii AD²=BD*DC
12²=6*CD
CD=144/6=24
raspuns corect d)

Answer 2

$AD^{2}=BD*DC \\ 12^{2}=6*CD \\ 144=6*CD \\ CD=144:6 \\ CD=24 \\ Raspuns:d)24cm.$