Question

 Na figura da foto, m (ABC) = m (DCA), AB = 12 , AC= 8, BC= 6. Calcule CD e BD. Calcule CD e BD.

Answer 1

desmembrando os Δ ABC     ΔACD

AB=12        AC=8

AC=8          AD=12-y

BC=6         CD=x

AB/AC=AC/12-y=BC/x

12/8=8/12-y         12/8=6/x

12(12-y)=8.8            12x=48                                     CD=4

144-12y=64                  x=48/12                               BD=20/3

12y=80                        x=4

y=80/12=20/3