Line = the shortest distance between two points.
no, it is the same thing as a RAY
They are different names for the same thing!
Yes.
line
straight angle
No. You can reflect any shape about a line but if the resulting image is not the same as the original, that line is not a line of symmetry.
no
no but its on the same line
There is no difference...same thing
The median is a line from a vertex to the midpoint of the opposite line and an altitude is a line from a vertex to the opposite line which is perpendicular to the line. These are NOT the same thing in most triangles. The only time they could be the same is in an equilateral triangle.
It means the same thing.
If you are speaking of a line of poetry, there is no other word which can be used to express the same thing.