Login

Ch 39: 6th-8th Grade Geometry: Circles

About This Chapter

The video lessons in this chapter have been created to teach middle school students geometry concepts related to circles in simple and fun ways. Expert instructors are a click away to answer any questions that come up. Use the lesson quizzes and chapter exam to assess comprehension of the material.

6th-8th Grade Geometry: Circles - Chapter Summary

For any middle school student who needs reinforcement or clarification about geometry concepts related to circles, the lessons in this chapter have been created to do just that. They'll learn what constitutes a circle and how to calculate the essential dimensions of this shape, including diameter and radius.

Additionally, they'll work through word problems that challenge them to solve problems using circle geometry. Dimensions of quarter circles will also be reviewed. Subject matter experts are available to answer any questions about the material. Short quizzes following each lesson and a chapter exam are available for self-assessment.

Chapter Lessons and Objectives

Lesson Objective
Parts of a Circle Identify parts of a circle such as the center, radius, chords and diameter.
Central and Inscribed Angles: Definitions and Examples Define central and inscribed angles.
How to Find the Radius of a Circle: Definition & Formula Discover how to find the radius of a circle using a short formula.
How to Find the Diameter of a Circle: Definition, Formula & Example See how to find a circle's diameter through example problems.
Circles: Area and Circumference Learn and apply formulas to calculate area and circumference of circles.
Semicircle: Definition, Perimeter & Area Formulas Demonstrate how to calculate area, perimeter, radius and diameter of semicircles.
Quarter Circles: Calculating Area, Perimeter & Radius Explain and use formulas for calculating area, perimeter and radius of quarter circles.
Circles in Word Problems Solve word problems involving circles.

8 Lessons in Chapter 39: 6th-8th Grade Geometry: Circles
Parts of a Circle

1. Parts of a Circle

After watching this video lesson, you will be able to identify the parts of a circle. You will learn the names of four different parts of a circle along with what each part does for the circle.

Central and Inscribed Angles: Definitions and Examples

2. Central and Inscribed Angles: Definitions and Examples

When we're working with circles, there are two key angles to know: central angles and inscribed angles. These angles have a few special theorems, which we'll discuss and practice using in this lesson.

How to Find the Radius of a Circle: Definition & Formula

3. How to Find the Radius of a Circle: Definition & Formula

In this lesson, you will discover the definition of a radius. You will also learn how to find the radius of a circle using three different formulas based on diameter, circumference, and area.

How to Find the Diameter of a Circle: Definition, Formula & Example

4. How to Find the Diameter of a Circle: Definition, Formula & Example

Learn the definition of the diameter of a circle and how to find it using a simple formula. See some examples, then test your knowledge with a short quiz.

Circles: Area and Circumference

5. Circles: Area and Circumference

Understanding how to calculate the area and circumference of circles plays a vital role in some of our everyday functions. They serve as the foundation for operating with three-dimensional figures. Learn more about the area and circumference of circles in this lesson.

Semicircle: Definition, Perimeter & Area Formulas

6. Semicircle: Definition, Perimeter & Area Formulas

In this lesson, you'll discover what a semicircle is. You'll also discover the formulas for perimeter and area that will work on every semicircle. Then, test your new knowledge with a brief quiz.

Quarter Circles: Calculating Area, Perimeter & Radius

7. Quarter Circles: Calculating Area, Perimeter & Radius

Watch as we solve problems involving the quarter circle in this video lesson. Learn what quarter circles look like, how to find their area, their perimeter, and their radius.

Circles in Word Problems

8. Circles in Word Problems

Watch this video lesson to learn how you can solve word problems that involve circles. Learn how the properties of circles make your problem-solving life that much easier and quicker.

Earning College Credit

Did you know… We have over 95 college courses that prepare you to earn credit by exam that is accepted by over 2,000 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Other Chapters

Other chapters within the 6th-8th Grade Math: Practice & Review course

Support