Two lines that intersect and form 90-degree angles (right angles) are "perpendicular" to each other. You would call them "perpendicular lines."
They are perpendicular lines that intersect at right angles or 90 degrees
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.
When two lines cross each other they form vertical equal opposite angles