parallel
Perpendicular
Two lines that intersect and form 90-degree angles (right angles) are "perpendicular" to each other. You would call them "perpendicular lines."
two lines that are perpendicular form right angles
Perpendicular lines form right angles when they intersect.
Perpendicular lines intersect to form right angles
Perpendicular lines form right angles at their intersections.
All of them. If its truly intersecting lines, they have to form right angles. All of them. If its truly intersecting lines, they have to form right angles.
Orthogonal. The lines form right angles in a 2-d plane.
Perpendicular Lines form right angles at their point of intersection
By definition, perpendicular lines form right angles.
The lines that intersect to Form A right triangle are called Perpendicular Lines; the resulting meeting point of these two lines is called the vertex of the angle.
right angles