How can you use the VSEPR model to predict the shape of, and the bond angles in a molecule?

the VSEPR model utilizes electron-pair geometry (regions around the central atom) and molecular geometry (amount of lone pairs around the central atom–so whatever the electron-pair geometry is, you just count the amount of lone pairs in those regions).

Explanation:

No lone pairs around the central atom, the electron pair and molecular geometry would be the same. Bond angle differs depending on the electron pair geometry and molecular geometry you have for a molecule.