Geometry: The Basics of Lines and Sectors

By Deb Russell, About.com Guide

A line has no endpoints, therefore you cannot measure how long it is. A line segment however, has 2 endpoints and the length of a line segment can be measured. When working with lines and line segments, it's handy to have dot paper available to be able to sketch lines and line segments for meaninful math activities.

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• Lines and Line Segments
• A Ray
• Intersecting Lines or Segments
• Concurrent Lines or Line Segments
• Perpendicular Lines or Line Segments
• Parallel Lines or Line Segments
• Skew Lines or Line Segments

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