The molecular geometry of NF3 is trigonal pyramidal.
Explanation: NF3 (Nitrogen Trifluoride) has a central nitrogen atom bonded to three fluorine atoms and one lone pair of electrons. The presence of the lone pair on the nitrogen atom causes the molecule to adopt a trigonal pyramidal shape. This is because the lone pair exerts a greater repulsive force than the bonding pairs, pushing the fluorine atoms slightly closer together and creating a pyramid-like structure.