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.AD²=BD*DC
AD²=3*12
AD²=36
AD=6cm

2. AB²=BC*BD
BC=AB²/BD
BC=6²/4 
BC=9cm