Lines which are parallel. All other lines on the same plane eventually intersect.
The lines all have the same slope.
All regular octagons have the same number of lines of symmetry, but octagons with unequal sides would have fewer lines of symmetry.
That is correct. All 3 dimensions of a cube are the same.
yes
Row width does not adjust. You can adjust column width or row height.
Yes
Dishwashers come in a standard 24" width and a compact 18" width.
The width height and length would all be the same
no
The goal posts, cross bars, and lines on the field must all be same width/diameter. This cannot exceed 12 cm (5 in).
Lines are two connected points with length but no width. When the end points of lines are all shared by other lines a shape is formed. This shape is known as a polygon.
Lines which are parallel. All other lines on the same plane eventually intersect.
Columns in an Excel table can be any width you like.
As with all rivers the width varies.
Not all carrots are the same size!
No just make sure it follows all local laws.