In geometry, a horizontal line is one which runs from left to right across the page. It comes from the word 'horizon', in the sense that horizontal lines are parallel to the horizon.
vertical, perpendicular, plumb mean being at right angles to a base line. vertical suggests a line or direction rising straight upward toward a zenith. the side of the cliff is almost vertical perpendicular may stress the straightness of a line making a right angle with any other line, not necessarily a horizontal one.
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Answer:
In geometry, a horizontal line is one which runs from left to right across the page. It comes from the word 'horizon', in the sense that horizontal lines are parallel to the horizon.
vertical, perpendicular, plumb mean being at right angles to a base line. vertical suggests a line or direction rising straight upward toward a zenith. the side of the cliff is almost vertical perpendicular may stress the straightness of a line making a right angle with any other line, not necessarily a horizontal one.
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