How do you name an angle?

It depends on how many degrees it is. an angle over 90 degrees is an obtuse angle, an angle 90 degrees exactly is a right angle, an angle under 90 degrees is an acute angle, and an angle exact 180 degrees is a straight angle.

You use a protracter and then if it is above 90 it is oubtuse

if it is 90 it is a right angle

if it is less then 90 it is a acute

and last but not least if it was180 it is also an straight angle