# Perpendicular Lines

🏆Practice perpendicular lines

Perpendicular lines are vertical lines that form a right angle between them, that is, an angle of $90°$ degrees.
Perpendicular lines appear in many geometric shapes, such as a rectangle, a square, a right triangle, and others.

## Test yourself on perpendicular lines!

Which lines are parallel to each other?

## Some examples of perpendicular lines

Perpendicular lines that form a $90°$ degree angle between them.
Perpendicular lines in a right triangle.
Perpendicular lines in a rectangle: the $2$ adjacent sides in the rectangle are perpendicular to each other.

## Examples and exercises with solutions of perpendicular lines

### Exercise #1

Which lines are perpendicular to each other?

### Step-by-Step Solution

Let's remember that perpendicular lines are lines that form a right angle of 90 degrees between them.

The only drawing where it can be seen that the lines form a right angle of 90 degrees between them is drawing A.

### Exercise #2

Which lines are perpendicular to each other?

### Step-by-Step Solution

Perpendicular lines are lines that form a right angle of 90 degrees between them.

The only drawing where the lines form a right angle of 90 degrees between them is drawing A.

### Exercise #3

Which figure shows perpendicular lines?

### Step-by-Step Solution

Perpendicular lines are lines that form a right angle between them.

In the drawings A+C+D, you can see that the angles formed are not right angles.

It is possible to point out a right angle in drawing B.

### Exercise #4

Which of the figures shows parallel lines?

### Step-by-Step Solution

Parallel lines are lines that, if extended, will never meet.

In the drawings A+B+D if we extend the lines we will see that at a certain point they come together.

In drawing C, the lines will never meet, therefore they are parallel lines.

### Exercise #5

Which of the figures show perpendicular lines?

### Step-by-Step Solution

Perpendicular lines are lines that form a right angle of 90 degrees between them.

It can be observed that in figures 1 and 3, the angles formed by the lines between them are right angles of 90 degrees.