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Well the easiest way to do this (but in no way perfectly accurate) would be to extend both lines as far as you can on either end. If the lines never meet on either side you've got parallel lines. Well, either that or you're not drawing straight lines, or you haven't drawn them out far enough. The accurate way would be to draw a perpendicular line from one of them towards the other and measure the angle against the second line. If it's perpendicular to both lines you've got yourself parallel lines.

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17y ago

What else can I help you with?