CHEM 121 glossary
Bond angle
The angle between two bonds that share a central atom, e.g. H–O–H. VSEPR gives ideal values (180°, 120°, 109.5°, 90°); lone pairs and multiple bonds squeeze nearby angles below them.
Example
109.5°, ≈ 107°, ≈ 104.5°: each extra lone pair narrows the angle.