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Line Segment – Definition, Examples | EDU.COMEDU.COMResourcesBlogGuidePodcastPlanBackHomesvg]:size-3.5">Math Glossarysvg]:size-3.5">Line SegmentLine Segment – Definition, ExamplesTable of ContentsLine Segments Definition of Line Segments

A line segment is a part of a line that connects two specific points. Unlike a full line that extends endlessly in both directions, a line segment has two fixed endpoints and a measurable length. The length of a line segment is the distance between its two endpoints, which can be measured in various units such as millimeters, centimeters, feet, or inches.

Line segments are typically represented using a bar symbol over the endpoints. For example, a line segment with endpoints P and Q would be written as PQ‾\overline{PQ}PQ​. In our everyday lives, we can find line segments in many objects such as the edges of a table, sides of geometric shapes, matchsticks, pencils, and the edges of rulers.

Examples of Line Segments Example 1: Naming Line Segments Problem:

Write the name of given line segments.

PQ line segment and XY line segment

Step-by-step solution:

Step 1, Look at the first line segment. Notice it has two endpoints labeled P and Q.

Step 2, Name this line segment using the bar notation. The correct naming is PQ‾\overline{PQ}PQ​.

Step 3, Look at the second line segment. Notice it has two endpoints labeled X and Y.

Step 4, Name this line segment using the bar notation. The correct naming is XY‾\overline{XY}XY.

Example 2: Finding All Possible Line Segments Problem:

Write all possible line segments in the given figure.

Finding All Possible Line Segments

Step-by-step solution:

Step 1, Understand that each pair of vertices in the figure can form a line segment.

Step 2, Find the first line segment by connecting points U and V. This gives us UV‾\overline{UV}UV.

Step 3, Find the second line segment by connecting points V and W. This gives us VW‾\overline{VW}VW.

Step 4, Find the third line segment by connecting points U and W. This gives us UW‾\overline{UW}UW.

Step 5, List all three line segments: UV‾\overline{UV}UV, VW‾\overline{VW}VW, UW‾\overline{UW}UW.

Example 3: Counting Line Segments Problem:

Count the number of line segments in the given figure.

Counting Line Segments

Step-by-step solution:

Step 1, Look at the figure carefully to identify each individual line segment.

Step 2, Count each straight line portion that forms part of the figure.

Step 3, Make sure you don't miss any segments, especially at corners or intersections.

Step 4, After counting all parts of the figure, you will find that there are 7 line segments in total.

Comments(7)FFigureSkaterVioletNovember 4, 2025This clear def of line segments really helped my students! It's made naming & counting them in shapes so much easier. Thanks!

PPoetMonaNovember 4, 2025This glossary def of line segment is great! I've used it to help my students grasp the concept. Clear and easy to understand.

MCMs. CarterSeptember 17, 2025I used the Line Segment definition and examples from this page to help my kids with their geometry homework. The clear explanations and diagrams made it so much easier for them to understand. Thanks for the great resource!

MCMs. CarterSeptember 10, 2025I’ve been helping my kids with geometry, and this page explained line segments so clearly! The examples made it super easy for them to understand and practice. Great resource!

MCMs. CarterAugust 27, 2025I used this clear definition of a line segment to help my kids with their geometry homework. The examples made it so easy for them to understand and apply. Thanks for such a helpful resource!

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