Step 1: Recall geometries associated with hybridization.
Different hybridizations correspond to specific molecular geometries based on electron pair arrangement.
Step 2: Analyze sp\(^2\) hybridization.
In sp\(^2\) hybridization, one s and two p orbitals mix to form three equivalent hybrid orbitals.
These orbitals arrange themselves at 120° to each other in one plane, forming trigonal planar geometry.
Step 3: Conclusion.
Trigonal geometry is associated with sp\(^2\) hybridization.