A line does not in itself have any sides. One could however say that if you had to choose which side of a line to be on, then there are multiple answers:
one.
A trapezoid has four line segments that forms its four sides.
If you are speaking of a hypothetical two dimensional line, then while there are two different sides one could be on in relation to it, there are no sides to the line itself.If you are speaking of a straight line actually drawn, then there are four sides, for it can't help but to have a tiny amount of "width", thus making it a very thin rectangle.(One could be even more exact and note that the line drawn on paper not only has a bit of width, but an even smaller amount of "depth" in it's coating of the paper. Thus that straight line has six sides, being a very thin rectangular tube.)
a line/dash on the matching sides
a line
one.
An 'edge' is the line in which two sides (planes) intersect.
Half an octagon has five sides is it is divided in two by a line joining opposite vertices. It has six sides in the dividing line joins the midpoints of opposite sides.
The same as a straight line.
5 is the answer
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It has 1 line of symmetry
5 Shapes, 8 sides
A trapezoid has four line segments that forms its four sides.
An 8 sided octagon has 8 line segments which are its 8 sides
A decagon has 10 sides and 35 diagonals
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