The shape of ${\text{BF}}_3$ molecule is

 ${\text{BF}}_3$having three bonding pairs of electrons.

In  $\text{'}{\text{BF}}_3\text{'}$boron exhibits $\text{'}{\text{sp}}^2\text{'}$ hybridization

Bond angle $120°\text{C}$ , exhibits this molecule have Trigonal planar shape.