Răspuns:
B
| D
|
A______________C
BC=8rad3
t.h. =>AD^2 = 2rad3×6rad3 = 36 =>AD = 6cm
t.cat. =>AB^2 = BD×BC = 2rad3×8rad3 = 48 =>AB=4rad3
t.cat. =>AC^2 = DC×BC = 6rad3×8rad3 = 144 =>AC=12
sinB=AD/AB=6/4rad3=3/2rad3=3rad3/6=rad3/2 =>m(<B) = 60° =>m(<C) = 30°