About This Chapter
ACT Math: Lines and Angles - Chapter Summary
The ACT Math section contains several questions concerning lines and angles in geometry. If you need to get ready for the ACT, work through these fun video lessons to refresh your knowledge of basic line and angle topics. You can expect to study vertical angles, parallel lines, line segments, rays and much more. By the end of the chapter, you should be able to:
- Analyze geometric points, lines and angles
- Compare angle types
- Use angle relationships to solve equations
- Recognize perpendicular, parallel and transverse lines
- Measure rays and line segments
- Describe the line of symmetry in a geometric shapes
Try the accompanying self-assessment quizzes to sharpen your geometry skills and improve your ability to solve problems involving angles and lines. You can use the Ask the Expert feature if you have any questions about these geometry concepts. The chapter also includes transcripts that you can print out to study offline.
1. Points, Lines & Angles in Geometry
After watching this video lesson, you should understand the basic terms that form the foundation of geometry. Learn what a point is, what a line is, what an angle is, and learn about a special type of angle called a right angle.
2. Types of Angles: Vertical, Corresponding, Alternate Interior & Others
In addition to basic right, acute, or obtuse angles, there are many other types of angles or angle relationships. In this lesson, we will learn to identify these angle relationships and discuss their measurements.
3. Solving Equations With Angle Relationships
In this lesson, we explore how to find unknown variables in geometric figures. Using examples, we will show how angle relationships work with algebra to provide solutions.
4. Parallel, Perpendicular and Transverse Lines
What are the different types of lines? Where are they visible in the real world and how can you recognize them? Find out here and test your knowledge with a quiz.
5. Line Segments & Rays: Definition & Measurement
Watch this video lesson to learn the difference between a line segment and a ray. You will also learn how to measure and add line segments. Learn why you can't measure or add a ray.
6. What is a Line of Symmetry in Geometric Shapes?
After viewing this lesson, you should be able to identify shapes that have a line of symmetry in them and know how to find where this line is. A short quiz to test your knowledge will follow the lesson.
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