Download a PDF of the Bill of Rights. The first 10 amendments to the Constitution make up the Bill of Rights. Written by James Madison in response to calls from several states for greater constitutional protection for individual liberties, the Bill of Rights lists specific prohibitions on governmental power.
When two lines are perpendicular, the slope of one is the negative reciprocal of the other. If the slope of one line is m, the slope of the other is. Try this Drag points C or D. Note the slopes when the lines are at right angles to each other.
Definition. Parallel lines are two lines that are always the same distance apart and never touch. In order for two lines to be parallel, they must be drawn in the same plane, a perfectly flat surface like a wall or sheet of paper. Parallel lines are useful in understanding the relationships between paths of objects and sides of various shapes.