The imaginary semi-circular "lines" of constant longitude are "meridians".
The imaginary full-circular "lines" of constant latitude are "parallels".
another name for a line of longitude is meridian.
The equator is another name for the 0 line of latitude.
A Parallel - because they are imaginary lines that run around the earth parallel to the equator
parallels is the name
Another name for the Playfair Axiom is the Euclid's Parallel Postulate. It states that given a line and a point not on that line, there is exactly one line parallel to the given line passing through the given point.
It is a transversal line that intersects other lines.
There is no specific name - other than what you used: "a pair of parallel line segments".
Collinear lines are on the same line.
Diameter
The y axis on the Cartesian plane is a vertical number line
Another name for a strait is line
Symetrical line
A 'mirror image'
The name "line" is actually used in math.The name "line" is actually used in math.The name "line" is actually used in math.The name "line" is actually used in math.
A line with only one endpoint is a ray. One end has a point, and the other has an arrow to represent how the line continues forever.-------------------------->
A diagonal.
its actually called "a break".