That refers to lines that meet at right angles - angles of 90 degrees.
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Slanting lines are lines that are straight but lean in another direction.
Either perpendicular lines if the lines create 90o angles or intersecting lines.
Those lines are perpendicular.Those lines are perpendicular.Those lines are perpendicular.Those lines are perpendicular.
you call intersecting lines that meet, just intersecting lines yolanda
A shape with 4 straight lines in which there are 2 parallel and 2 unparallel lines is called a Trapezium.