Question

1. In triunghiul ABC cu m(A)=90 grade , construim inaltimea AD , D e (BC) . Daca BD=3 cm si CD=12 cm , aflati AD.
2.In triunghiul ABC cu m(A)=90 grade , construim inaltimea AD , D e (BC) . Daca AB= 6 cm si BD=4 cm , aflati BC.

Answer 1

1)AD^2 =BD*DC
AD^2 =3*12 =36
AD = 6 CM

2)AB^2 =BC*BD
6^2 =BC*4
36 =BC*4
BC=36:4 =9 cm