The geometry about nitrogen when it makes bonds to three other atoms is

When Nitrogen makes bonds to three other atom, the geometry form is tetrahedral angle due to the disproportionate influence of the non-bonding lone pair. Each of the four-sp3 hybrid orbitals takes one electron each, and that leaves us with 1 more electron. Then, this goes into one of the sp3 hybrid orbitals that already contains 1 electron, giving it a total of 2 electrons. The lone pair on nitrogen is stereo-chemically active. Therefore, 1s orbital and 3p orbitals create four degenerate sp3 orbitals, but bonding occurs to only 3 other atoms, and those in the non-bonding orbital do not participate. Therefore, the geometry shape of a molecule depends on the spatial positioning of covalent bonds to atoms.