The pair of species having identical shape of both species

n ${\mathrm{CO}}_2$ molecule, the hybridization of central atom (Carbon) is sp.  So, the geometry of ${\mathrm{CO}}_2$  molecule is linear.  In ${\mathrm{XeF}}_2$  molecule, the hybridization of central atom at Xe is ${\mathrm{sp}}^3{\mathrm{d}}^2$ . There are two bond pairs are positioned by180°  around Xe and three lone pair of electrons are oriented around the central atom Xe in order to minimize the repulsion forces.  Therefore, the final geometry of ${\mathrm{XeF}}_2$  is linear.  Here, we can see the structures of ${\mathrm{XeF}}_2$  and ${\mathrm{CO}}_2$ in the below: