supplementary angles form a straight line since they add to 180 degrees by definition
There is no particular name.
a line with an angle in it would technically be 2 linesA circle has a sum of angles that add up to 360 degrees and it is not a straight line.
The sum of the three constitutive angles of a planar triangle is always equal to 180 degrees or two right angles. And there are two things in it as well. they are diagonal and a exterior angle
"Meridian of longitude"Your description of the line is interesting. Can you draw a line from north pole to south pole that does NOT form right angles with the equator ???
The question has provided the answer - it is 180°.If the question is asking, "What is the name given to angles that add up to 180°?"then the answer is supplementary angles.
In geometry, a median is a straight line joining a vertex of a triangle to the midpoint on the opposite side. Being a straight line there are no angles on it so no 180 deg. In statistics, the median in the value of the middle-ranking observation. So, if there is a set of observations of angles, it is possible that the median is 180 degrees but there is no special name.
supplementary and straight
A Circle
Line segment
Hendecagon
I am pretty sure its a line segment.