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In Euclidea space it is either a point or the two lines - which must be coincident. ----- Intersection = the point/s where the two lines meet in space. It is a point or set of points that are common to two or more geometric configurations (also called "product" - the set of elements that are common to two sets).
You cannot. The intersection of 2 planes must be a straight line or the whole plane; it cannot be just a point.
The question is baffling. They're not different. Perpendicular lines must be intersecting lines.The only lines that are not intersecting lines are parallel lines. If two lines arenot parallel, then they must intersect, and they can be perpendicular or not.
Two perpendicular lines must cross at a 90 degree angle, like a plus sign: +
Lines of symmetry must be equal halves.