"perpendicular lines"
If they intersect at right angles which is 90 degrees then they are perpendicular lines.
As we know equipotential surface means there is no potential difference that is no work is done on surface.so lines of force must intersect surface at right angles to satisfy this statement,so that net work is zero.
They are perpendicular if their slopes are mutual negative reciprocals.
Perpendicular lines are two lines that intersect at a 90-degree angle, forming a right angle where they meet. In geometric terms, the slopes of perpendicular lines are negative reciprocals of each other. Visually, perpendicular lines appear to be at right angles to each other, creating a distinct "L" shape where they intersect.
Well, there are really only two: parallel and intersecting. Parallel lines go in the same direction and never cross; intersecting lines do cross (or intersect). However, a third relationship, that's actually a special case of intersecting lines, is the case of perpendicular lines. Perpendicular lines are those that make four right angles when they intersect. Really, it's enough if you know that only one of the angles is a right angle - the rest follow automatically.
When the lines intersect at a 90º angle
A square "corner" is 90 degrees, (assuming you meant 90 degrees, not 90 angles), and has parallel lines, thus, it must be a parallelogram! A parallelogram that has right angles, is a rectangle. Technically, all that is needed to know is 4 right angles, since all right angles implicate parallel lines and 90 degree angles.
If by two sets of perpendicular lines you mean two pairs of perpendicular lines we can do it. One set of parallel lines is easy so draw that as the first and second lines A right angle from one of them will intersect the other at a right angle so that's the third line and the right angles sorted. The fourth side cannot be parallel to the third so draw it at an angle to the third. We now have two right angles, one set of parallel lines and two pairs of perpendicular lines, first and third, and second and third. What we call it depends on where we are. In the UK it is called a trapezium and in the USA a trapezoid. I'm afraid I don't know naming conventions in other countries.
Parallel, you should know that if you're not in kindergarten.
Perpendicular lines are like two strangers standing at a right angle to each other - they never meet and have nothing in common. They are a pair of lines that intersect at a 90-degree angle, creating a perfect L-shape. Think of them as the odd couple of geometry - they may not get along, but they sure know how to keep things interesting.
It has 4 equal sides It has opposite parallel sides It has 2 opposite equal acute angles It has 2 opposite equal obtuse angle It has 2 diagonals that intersect each other at right angles
Rhombuses and trapezoids have no right angles by definition.