Are intersecting lines perpendicular or not perpendicular?
Intersecting lines may or may not be perpendicular.
If the angle of intersection between two intersecting lines is
90 degrees, then the two lines are perpendicular. Otherwise, the
lines are not perpendicular.
For example:
A
|
|
|
B ----|-----
|
|
Here, the lines A and B are intersecting. The angle between A
and B is 90 degrees. Therefore, line A and line B are perpendicular
to each other.