# Ch 3: Basic Geometry: Lines & Angles

### About This Chapter

## Who's It For?

Anyone who needs help learning or mastering material about lines and angles will benefit from the lessons in this chapter. There is no faster or easier way to learn about lines and angles. Among those who would benefit are:

- Students who have fallen behind in understanding lines and angles in geometry
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning math (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about lines and angles
- Students who struggle to understand their teachers
- Students who attend schools without extra math learning resources

## How It Works:

- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the Basic Geometry: Lines and Angles chapter exam.

## Why It Works:

**Study Efficiently:**Skip what you know, review what you don't.**Retain What You Learn:**Engaging animations and real-life examples make topics easy to grasp.**Be Ready on Test Day:**Use the Basic Geometry: Lines and Angles chapter exam to be prepared.**Get Extra Support:**Ask our subject-matter experts any question about lines and angles. They're here to help!**Study With Flexibility:**Watch videos on any web-ready device.

## Students Will Review:

This chapter helps students review the concepts in a lines and angles unit of a standard geometry course. Topics covered include:

- Differences between line segments and rays
- Defining parallel, perpendicular and transverse lines
- Identifying the properties of various geometrical angles
- Learning to measure angles with a protractor

### 1. Line Segments & Rays: Definition & Measurement

A line segment is a line with a starting point and endpoint, while a ray is a line with only one endpoint. Learn the definition of line segments and rays, how the distance of line segments is used in measurements, and discover how to add line segments together.

### 2. Parallel, Perpendicular and Transverse Lines

Lines have a specific shape, but there are different types of them according to how they relate to other lines in the same plane. Learn about the different types of lines, including parallel, perpendicular, and transverse lines, and see the formulas you can use to determine the type of line.

### 3. Angles Formed by a Transversal

Parallel lines are two lines that never touch while remaining the same distance apart, whereas a transversal is a straight line that crosses two other lines. Learn about the angles formed by a transversal intersecting parallel lines, specifically congruent angles.

### 4. How to Measure Angles with a Protractor

A protractor is a measuring tool for angles and can also be used to draw angles. Learn about vocabulary related to angles and protractors, the different types of angles, and understand how to measure and draw angles.

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### Other Chapters

Other chapters within the Basic Geometry: Help & Review course

- Introduction to Basic Geometry
- Geometry Topics
- Basic Geometry: Polygons
- Basic Geometry: Triangles
- Basic Geometry: Quadrilaterals
- Basic Geometry: Circles
- Basic Geometric Constructions
- Basic Geometry: Similar Figures
- Basic Geometry: Perimeter, Circumference & Area
- Basic Geometry: 3-Dimensional Figures
- Lines and Angles in Geometry
- Perimeter, Area & Volume
- Geometric Properties of Objects
- Geometric Graphing Basics
- Geometric Graphing Functions