It is called a supplementary angle.
This type of angle is called a 'revoloution angle'.
It could be called angle C, as long as that name is unambiguous.
It is just called a "central angle".
It is called a reflex angle.
its called a right angle!
An angle which measure exactly 90 degrees is called a right angle.
There is not a special name. You simply use the name for the angle which is left after you subtract 360 degrees from the angle.
I think it is just called the right angle symbol
It is called the right angle! Smart one!
Any angle past 90 degrees is called an obtuse angle.
A 90o angle is a right angle, and a triangle with a right angle is called a right triangle.