Q:

# What are perpendicular lines?

A:

Perpendicular lines are those that form a right angle at the point at which they intersect. Parallel lines, though in the same plane, never intersect.

## Keep Learning

Credit: Fotosearch Getty Images

Another fact about perpendicular lines is that their slopes are negative reciprocals of one another. The two slopes multiplied together always produce an answer of -1. The formula for slope is rise divided by run. If a line goes through point (x1y1) and point (x2y2), the formula for its slope is set up as y2 - y1 / x2 - x1. If the slope of one of the two perpendicular lines is 1/2, the slope of the other is -2.

Sources:

## Related Questions

• A: A symmetrical pattern is a pattern in which converging lines form an angle that somewhat resembles an acute angle. When two patterns are symmetrical, one b... Full Answer >
Filed Under:
• A: A zero degree angle appears as a straight line that travels from the point of inception to the right or positive side of a number line. If the line travels... Full Answer >
Filed Under:
• A: The incenter of a triangle is defined as the point where all three angle bisectors intersect. It can be found using a compass and a straight edge by constr... Full Answer >
Filed Under:
• A: The centroid of any triangle, right triangles included, is the point where the angle bisectors of all three vertices of a triangle intersect. Given a trian... Full Answer >
Filed Under:
PEOPLE SEARCH FOR