of degree at most $k$
in some degree
to $\langle$in$\rangle$ a lesser degree
A number of authors have considered, in varying degrees of generality, the problem of determining ......
He received his master and PhD degrees from the University of Texas.
Let $ABC$ be an angle of sixty degrees.
The two lines intersect at an angle of ninety degrees.
This is the lattice packing rotated $45^o$.
a $180^o$ rotation