What is the meaning of "a straight line"?
40739
Naive visualization of space-time curvature
109703
heading with horizontal line on either side
24664
What does it mean for objects to follow the curvature of space?
134199
Holomorphic function mapping a set onto a straight line
118637
Straight quotes vs. curly quotes in formal writing
69115
Imaginary line on the Earth is straight or not?
153103
How to tell whether a point is to the right or left side of a line
117396
What does this symbol mean? (looks like a 1 with double vertical line)
132831
A circle with infinite radius is a line
103104
Dotted line on curve?
60227
What is this yellow line with a dot at the end?
52156
What does the equal sign mean in mathematics?
136658
In Harry Potter, Do Spells Travel in a Straight Line?
34029
Find intersection of pairs of straight lines
64410
Straight quotes?
124662
Why do we believe the equation $ax+by+c=0$ represents a line?
103808
How to intersect a line with a point off the page using a straight edge and compass (see description)