Which of the following bond angle is related to ${\mathrm{NO}}_2$ molecule?

120°, 110°, 115°, 180°, 134°.

Bond angle is defined as the angle between the two bonds, i.e. angle between two orbitals containing bonding electron pairs around the central atom in a complex molecule or ion. Therefore, 180° and 120° bond angle is related to ${\mathrm{NO}}_2$molecule.