undergraduate degree
Another name for a graduate degree is a "postgraduate degree." This term encompasses advanced degrees obtained after earning a bachelor's degree, including master's degrees, doctoral degrees, and professional degrees.
A fourth degree polynomial can be called a "quartic".
A line.
straight angle
90 degree angles
The Prime Meridian
a 90 degree triangle
90 degree angle pipe
180 degree angle
Frahm's 90 degree carver
less than than a 90 degree angle
college diploma, certificate