Identify the diagram and explain if it is a pair of parallel lines or perpendicular lines?Īnswer: The above diagram shows perpendicular lines as both the lines intersect at one point and form an angle of 90° at the intersection. Which of the following diagrams is a line?Īnswer: The second diagram is a line as the two endpoints represent and includes an arrow, which extends endlessly in opposite directions. Euclid, in his book Elements, which is one of the most influential books ever written, has referred to the term line several times. If three or more points are placed on the same line, they are called collinear points. Additionally, when we put one point at one end and an arrow at the other end, it forms a ray. When we place two points at each end of the line, it forms a line segment. It can only extend in length limitlessly. A line does not have width or thickness. A line is made up of an infinite number of points. Let’s get to know a few interesting facts about lines. When two lines on the same plane intersect each other and form a 90° angle at the point of intersection, they are known to be perpendicular lines. The parallel lines and the transversal line must be on the same plane. On the contrary, when two or more pairs of lines are on the same plane and intersect each other at one given point, they are known as intersecting lines.Ī transversal line is a line that passes through two or more parallel or non-parallel lines at a given point. When such two lines do not intersect with each other, they are known as parallel lines. It occurs when more than one line is placed in the same dimension.Ī pair of two lines that are on the same plane and the distance between them is equal and remains constant. Moreover, there are also certain variations of the types of lines. Anything that makes a 90-degree angle or a right angle with the horizontal line or the horizon is called vertical. Moreover, vertical is the opposite of horizontal. In simple terms, a vertical line is also known as a standing line. Anything parallel to the horizon is known to be horizontal.Ī vertical line is a straight line that starts from the top to bottom or bottom to top. In simple terms, a horizontal line is also known as a sleeping line.Ī particular line at which the earth’s surface and the sky appear to meet is called the horizon. However, it is not perpendicular, parallel, vertical, or horizontal.Ī horizontal line is a straight line that starts from either left to right or right to left. Now Let’s understand the different types of lines.Ī line is a set of collinear points with no curves and extends limitlessly in opposite directions is called a Straight line.Ī line is a set of collinear points which has a curvature or bend in its formation is called a Curved Line.Īn oblique is a line that is diagonal or slanting. He defined it as “a breadthless length.” A scale or a ruler, a tool to measure length, is a straight line.Įuclid, a Greek mathematician – fondly known as the Father of Geometry – introduced the concept of a line. The edge of a table represents a straight line. A straight line is drawn on a piece of paper either horizontally or vertically with a pencil. A pencil or a pen is a representation of a straight line. 
Let’s look at some real-life objects as examples for your reference. To better understand the concept of a line, let’s look at the following diagram along with the explanation mentioned below.ĭid you know we are surrounded by objects that represent straight lines? They are all around us. We can find in them – straight geometry lines!
The straight tubes and pipes in a pipeline, Ray of the sun in the morning that shine, With the help of the pencil, draw a line along the horizontal edge of the ruler.Place the ruler on the paper and hold it firmly.To draw a line, take a pencil, a ruler, and a book or a piece of paper. The length of the line segment is the distance between the two endpoints, A and B. A line segment can be measured, whereas a line cannot. What is a Line Segment?Ī line segment, which is part of a line, has two defined endpoints.ĭiagram B represents a line segment with two endpoints, A and B. In simple terms, when a set of collinear points are connected in a one-dimensional plane, it is called a line. L in the above diagram represents a line. The two arrows at each end signify that the line extends endlessly and is unending in both directions. In geometry, a line is a straight one-dimensional figure that does not have a thickness, and it extends endlessly in both directions.ĭiagram A represents a line.
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