As the s-character of hybridized orbital decreases, the bond angle also decreases.
Decreases
As the s-character of hybridized orbitals decreases the bond angle also decreases.
In sp3 hybridisation: s-character 14, bond angle 109o
In sp2 hybridisation: s-character 13, bond angle 120o
In sp hybridisation: s-character 12, bond angle 180o