In geometry,apoint is a location represented by a dot. A point does not have any length, width, shape or size, it only has a position. When two distinct points are connected they forma line.

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1.What is a Point and a Line?
2.Types of Points and Lines
3.Tips on Points and Lines
4.Solved Examples
5. Practice Questions
6.FAQs on Points and Lines

The concept of points and lines is importantto understand geometry figures. With the help of points, we can label and identify the geometry figures and with the help of lines, we can draw the figures.


A point is defined as a location in any space and is represented by a dot (.). It does not have any length, height, shape, or size. It marks the beginning to draw any figure or shape and is labeled with capital letters.


A series of points connected by a straight path is defined as aline.A line is usually defined by two points. It can be marked with a single letter in the lower case or by two capital letters.A line has no thickness and can extend indefinitely in both directions. The length of a line is undefined and it can haveinfinite numbers of points. Observe the following figure to know the difference between a point and a line.


Types of Points and Lines

There are different types of points in geometry. Let us discuss them to identify them easily.

Collinear Points and Non-Collinear PointsIf three or more points lieon a single straight line then the pointsare called collinear points. If thegroup of points do not lie on the same line then those pointsare called non-collinear points.Coplanar Points and Non-Coplanar PointsIf a group of points lieon the sameplanethen they are said to be coplanar points. A set of points that do not lie on the same plane are non-coplanar points.Observe the following figure which shows the different types of points.


Types of Lines

Just like the different types of points, there are different types of lines which can be distinguished easily on the basis of their unique properties.

Horizontal Line – A line that is mapped from left-to-right or right-to-left and is parallel to the x-axis in a plane is called a horizontal line.Vertical Line – A line that is mapped from up to down or down to up and is parallel to the y-axis in a plane iscalled a vertical line.Intersecting Lines – When two lines cross each other and meet ata point, they are known as intersecting lines. The point at which they meet is known as the point of intersection.Perpendicular Lines– Whentwo lines intersect exactly at 90°, they are known as perpendicular lines.Parallel Lines – Two lines are said to be parallel if they do not intersect at any point and are equidistant.

Observe the figure given below which shows the different types of lines.


Tips on Points and Lines

A point does not have a length, width, shape or size.When two distinct points are connected they make aline.A line extends in both directions infinitely.Parallel lines do not intersect each other.The lines that intersect each other at 90° are known asperpendicular lines.Two or more points that lie on a single straight lineare collinear points.Two or more points that lie on the sameplaneare coplanar points.

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