# Quick Answer: What Is The Rule For Perpendicular Lines?

## What type of slope do perpendicular lines have?

The slopes of two perpendicular lines are negative reciprocals of each other.

This means that if a line is perpendicular to a line that has slope m, then the slope of the line is -1 / m.

For example, we found that the slope of the line y = (1/2)x + 3 is 1/2..

## Do perpendicular lines have to meet?

When two lines are perpendicular, the slope of one is the negative reciprocal of the other. Note too that the lines to do not have to intersect to be perpendicular. … In Fig 1, the two lines are perpendicular to each other even though they do not touch.

## What does it mean if a line is perpendicular to another line?

In elementary geometry, the property of being perpendicular (perpendicularity) is the relationship between two lines which meet at a right angle (90 degrees). The property extends to other related geometric objects. A line is said to be perpendicular to another line if the two lines intersect at a right angle.

## What is the slope of a line perpendicular to this line?

The slope of the perpendicular line is the negative reciprocal. This means you change the sign of the slope to its opposite: in this case to 3. Then find the reciprocal by switching the denominator and numerator to get 1/3; therefore the slope of the perpendicular line is 1/3.

## How do you represent perpendicular lines?

We use the symbol ⊥ to represent perpendicular lines. What are perpendicular lines in geometry? Lines that meet or cross at right angle are perpendicular to one another.

## How do you write an equation for parallel and perpendicular lines?

To find the slope of the given line we need to get the line into slope-intercept form (y = mx + b), which means we need to solve for y: The slope of the line 4x – 5y = –10 is m = 4/5. Therefore, the slope of the line perpendicular to this line would have to be m = –5/4.

## How do you determine if two lines are parallel?

We can determine from their equations whether two lines are parallel by comparing their slopes. If the slopes are the same and the y-intercepts are different, the lines are parallel. If the slopes are different, the lines are not parallel. Unlike parallel lines, perpendicular lines do intersect.

## What is perpendicular lines example?

To be perpendicular, they only need to have opposite reciprocal slope. For example, the lines, y=3x+8 and y= -(1/3)x-3 would be perpendicular because -1/3 is the opposite reciprocal of 3.

## At what angle do perpendicular lines meet?

90 degreesParallel lines never intersect. Perpendicular lines are lines that intersect at a right (90 degrees) angle.

## Which line is perpendicular to a line that has a slope of 1 3?

1 Answer. Daniel L. The slope of a line perpendicular to one with the slope of 13 is −3 .

## What is the formula for a perpendicular line?

x= lines are vertical, so a perpendicular line would be a horizontal line in the form y = #. Since the y intercept of the equation must be 1, the answer is y = 1.

## How do you know if lines are perpendicular?

Perpendicular lines intersect at right angles to one another. To figure out if two equations are perpendicular, take a look at their slopes. The slopes of perpendicular lines are opposite reciprocals of each other.

## Can two lines with positive slopes be perpendicular?

Theorem 103: If two nonvertical lines are parallel, then they have the same slope. … If two lines are perpendicular and neither one is vertical, then one of the lines has a positive slope, and the other has a negative slope. Also, the absolute values of their slopes are reciprocals.