lf two straight line are perpendicular to two parallel line, then show that these straight line are parallel to each other
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let line l and m be perpendicular to n.
suppose line n makes an angle x with the positive side of the x axis, then the lines l and m will make an angle x+90 degrees with the positive side of x axis. so both l and m will have the same slope, so they will be parallel to each other
suppose line n makes an angle x with the positive side of the x axis, then the lines l and m will make an angle x+90 degrees with the positive side of x axis. so both l and m will have the same slope, so they will be parallel to each other
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