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no because an arrowhead has to long lines and to small lines
An Arrowhead has got 1 line of symmetry so do NOT beleive what anyone else says!
A square has 2 pairs of opposite parallel lines.
If by four parallel lines you mean two pairs of parallel lines, then you would be looking for a parallelogram. An example of a parallelogram is at this address:http://upload.wikimedia.org/wikipedia/commons/4/41/Parallelogram.svgThe arrowhead lines along the sides designate that the opposite sides are parallel and of the same length. The single and double lines in each section show that the portions of line in each segment are identically sized.
There cannot be parallel lines in any [plane] triangles.