What is the pair of parallel lines

Vertical and parallel straight lines and lines

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Here you can find out what a right angle is and what the terms “point”, “line”, “ray”, “straight line”, “parallel”, “vertical” and “distance” mean.

right angle

You know right angles from your environment: you see them on doors, tables, windows and many other objects.

Point, segment, ray and straight line



Two straight lines (or rays or lines) are perpendicular to each other when they form one.

Intersections of straight lines

Several can intersect at none, one or more points. These points are called the intersections of the straight lines.