Which of the following species have the same shape?

Ozone exhibits ${\mathrm{sp}}^2$ hybridization, hence it should be shaped as a trigonal planar crystal. The angle between the oxygen atoms in ozone, however, is less than $120°$ because of resonance and one lonely pair of electrons in the structure of ozone.

An ${\mathrm{sp}}^2$ kind of hybridization occurs in ${\mathrm{NO}}_2^{-}$. Drawing the Lewis structure and counting the number of bonds and lone electron pairs around the nitrogen atom are the two easiest ways to measure the degree of hybridization of ${\mathrm{NO}}_2^{-}$. We shall discover that nitrogen dioxide contains one lone pair of electrons and two sigma bonds.