# Ch 31: Saxon Algebra 1/2: Perimeter and Circumference

### About This Chapter

## How It Works:

- Identify the lessons in the Saxon Perimeter and Circumference chapter with which you need help.
- Find the corresponding video lessons with this companion course chapter.
- Watch fun videos that cover the perimeter and circumference topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

## Students will learn:

- The process for determining a polygon's perimeter
- Different applications of the number pi
- The formulas for finding area and circumference of circles
- Perimeter and area formulas for a semicircle

*Saxon is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.*

### 1. Finding the Perimeter of Polygons

Finding the perimeter of polygons means that the distance that is all around the shape has to be found. Study the definition of polygons and the perimeter, and how to use a shortcut to find the perimeter for regular polygons.

### 2. What Is Pi? - Number & Usage

Pi is very useful to mathematicians, especially in finding the circumference or area of a circle. Explore the definition of pi, the number and approximations of pi, the uses of it, and an example of using pi.

### 3. Circles: Area and Circumference

Like all geometric shapes, circles take up space and a formula is required to calculate the area. Learn about the area and circumference of circles, explore the formula to calculate a circle's area, and review examples that use the diameter and others that use the circumference to find the area of a circle.

### 4. Semicircle: Definition, Perimeter & Area Formulas

Circles can be halved along their diameter to form two semicircles. Calculate the perimeter and area, and also determine the diameter and radius of a semicircle using the provided formulas.

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### Other Chapters

Other chapters within the Saxon Algebra 1/2 Homeschool: Online Textbook Help course

- Saxon Algebra 1/2: Whole Numbers & Operations With Whole Numbers
- Saxon Algebra 1/2: Fractions
- Saxon Algebra 1/2: Decimal Numbers
- Saxon Algebra 1/2: Roman Numerals
- Saxon Algebra 1/2: Graphs of Data
- Saxon Algebra 1/2: Graphs on the Coordinate Plane
- Saxon Algebra 1/2: Sets
- Saxon Algebra 1/2: Real Numbers
- Saxon Algebra 1/2: Number Theory
- Saxon Algebra 1/2: Properties of Real Numbers
- Saxon Algebra 1/2: English & Metric Measurement
- Saxon Algebra 1/2: Conversion by Unit Multipliers
- Saxon Algebra 1/2: Ratio & Proportion
- Saxon Algebra 1/2: Percent
- Saxon Algebra 1/2: Exponents
- Saxon Algebra 1/2: Roots
- Saxon Algebra 1/2: Probability
- Saxon Algebra 1/2: Statistics
- Saxon Algebra 1/2: Simplifying Expressions
- Saxon Algebra 1/2: Polynomials
- Saxon Algebra 1/2: Simplifying and Solving Equations
- Saxon Algebra 1/2: Linear Equations
- Saxon Algebra 1/2: Other Types of Equations
- Saxon Algebra 1/2: Functions & Trigonometry
- Saxon Algebra 1/2: Lines, Points, Segments, and Planes
- Saxon Algebra 1/2: Angles
- Saxon Algebra 1/2: Polygons
- Saxon Algebra 1/2: Circles
- Saxon Algebra 1/2: Triangles
- Saxon Algebra 1/2: Geometric Solids
- Saxon Algebra 1/2: Area
- Saxon Algebra 1/2: Surface Area and Volume
- Saxon Algebra 1/2: Constructions
- Saxon Algebra 1/2: Pythagorean Theorem