Question

Fie D ∈ (BC) IN ΔABC . Daca petrimetrul ΔABC=29 cm, perimetrul ΔABD=19cm si perimetrul ΔACD=26 cm, aflati lungimea segmentului [AD}. AJUUUUUTOOOOOOOOOOOOOOOOOOOOOOOOOR

Answer 1

 P abc - (Pabd +Pacd -2x)=
=29-(19+26-2x)
=29-19-26+2x
=29-45+2x
2x =45-29 =16
x =8      (am notat AD = x)
V;
19-8 =11
26-8=18
11+18 =29  ( P abc =29)