# Ch 28: Circles, Angles & Circular Arcs

Use our informative video lessons to learn all about circles, angles and circular arcs. The short quizzes that accompany them can help you measure your progress through this chapter.

## Circles, Angles and Circular Arcs - Chapter Summary and Learning Objectives

Circles are so plentiful around us that we often don't give them another thought. In this chapter, you can review measurement calculations for circles, learn the difference between major and minor arcs and find out how to construct figures inside and outside of other figures. You can also find out more about measuring angles involving secants, tangents and chords. In these lessons, you'll learn things like:

• What's the difference between circumference and area of circles?
• Where are inscribed and circumscribed figures located?
• How can I measure inscribed angles?
• When is a polygon 'regular'?
• How do I measure angles and lengths involving chords, tangents and secants?

Video Objective
Circles: Area and Circumference Calculate the circumference and area of circles.
Inscribed and Circumscribed Figures: Definition & Construction Construct circumscribed and inscribed figures.
How to Find the Measure of an Inscribed Angle Measure inscribed angles.
Tangent of a Circle: Definition & Theorems Understand the theorems for tangents of circles.
Arc Length of a Sector: Definition and Area Measure the arc length of sectors.
Measurements of Angles Involving Tangents, Chords & Secants Measure angles having tangents, secants and chords.
Measurements of Lengths Involving Tangents, Chords and Secants Discover the lengths when chords, tangents and secants are involved.
Regular Polygons: Definition & Parts Find out what makes a polygon regular and learn about the parts of polygons.

8 Lessons in Chapter 28: Circles, Angles & Circular Arcs
Test your knowledge with a 30-question chapter practice test
Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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