Final answer:
The molecular geometry of C₂H₂ according to its Lewis structure is linear.
Step-by-step explanation:
According to the Lewis structure of C₂H₂, there are two carbon atoms bonded to each other by a triple bond.
The electron pair geometry of C₂H₂ is linear. Although the electron groups are oriented in the shape of a tetrahedron, the shape of the molecule is linear because there are only two atoms in the molecule.
Therefore, the molecular geometry of C₂H₂ according to its Lewis structure is linear.