# Ch 15: Elementary Math: Geometry Concepts

### About This Chapter

## Elementary Math: Geometry Concepts - Chapter Summary

Rediscover a variety of geometry concepts in elementary math by taking advantage of the fun lessons in this self-paced chapter. Whether you're looking to boost your knowledge of perimeter, nets of three-dimensional figures, transformations or volumes of shapes, you've reached the right place! Completing this chapter will enable you to:

- Explain how to classify two-dimensional figures
- Exhibit knowledge of three-dimensional shapes in geometry
- Discuss how to represent figures in two and three dimensions
- Define area and surface area
- Detail how to compare measurement of shapes
- Share ways to approximate real world objects with geometric shapes
- Outline strategies for teaching students to compose and decompose geometric shapes
- Discuss how to plot points on the coordinate plane

All lessons in this chapter are available around-the-clock via your computer or mobile device of choice. This flexibility makes it easy for individuals with the busiest schedules to study whenever most convenient! As you review the lessons, use our multiple-choice quizzes to find out how well you understand concepts covered. For a broader review of this chapter, be sure to take our comprehensive practice exam.

### 1. Classifying Two-Dimensional Figures

In this lesson, we look at the classification of two-dimensional figures based on their properties. From that, we'll have a better understanding of the relationship between various figures.

### 2. Overview of Three-dimensional Shapes in Geometry

We are surrounded by three-dimensional shapes. Watch this video lesson to see what some three-dimensional shapes look like, such as a cube, a sphere, a brick, and a cylinder.

### 3. Representing Figures in Two & Three Dimensions

How can you made a 2D representation of something in 3D? What about the other way around? In the lesson, well use a polygon, polyhedron and a net to see just how this is done.

### 4. What is Perimeter? - Definition & Formula

In mathematics, the perimeter is the distance around a two-dimensional shape. The formula for finding the perimeter of certain shapes will be discussed in this lesson, and there will be some examples to help you understand how to calculate the perimeter.

### 5. What is Area in Math? - Definition & Formula

Area is the size of a two-dimensional surface. This lesson will define area, give some of the most common formulas, and give examples of those formulas. A quiz at the end of the lesson will allow you to work out some area problems on your own.

### 6. What is Surface Area? - Definition & Formulas

In this lesson, you use general and specific formulas to learn how to find the surface area of three-dimensional shapes, such as cubes, prisms, spheres, cones and cylinders.

### 7. Volumes of Shapes: Definition & Examples

Volume is defined as the 3-dimensional space enclosed by a boundary. In this lesson we will define volume, give some of the most common formulas and then work some example problems to become familiar with the formulas. There will be a quiz at the end of the lesson for practice.

### 8. Comparing Measurement of Shapes

There are a wide variety of geometric shapes. There are equations to determine their perimeters and areas. In this lesson, we will explore different shapes and compare their perimeters and areas.

### 9. Nets of 3-Dimensional Figures

After watching this video lesson, you will be able to deconstruct a 3-dimensional figure into its 2-dimensional net. Learn what kind of shape you will get after opening and flattening your 3-dimensional figure.

### 10. Approximating Real World Objects with Geometric Shapes

In this lesson, you'll learn that geometric shapes can actually make your calculations easier. Instead of making lots of little calculations, you can use geometry to make just a few calculations to find what you need.

### 11. Teaching Students to Compose & Decompose Geometric Shapes

Learning how to compose and decompose shapes can help students to understand more advanced geometric concepts. This lesson will help you teach students how to compose and decompose various shapes in order to determine perimeter, area, and volume.

### 12. Transformations in Math: Definition & Graph

In geometry, transformation refers to the movement of objects in the coordinate plane. This lesson will define and give examples of each of the four common transformations and end with a quiz to make sure you are moving in the right direction.

### 13. Plotting Points on the Coordinate Plane

If you'll be working with a graph, otherwise known as the coordinate plane, it's essential to understand how it works. This includes learning the parts of a graph, identifying points and plotting points.

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### Other Chapters

Other chapters within the Praxis Elementary Education - Curriculum, Instruction & Assessment (5017): Study Guide & Practice course

- Elementary ELA: Curriculum Concepts
- Elementary ELA: Reading Foundational Skills
- Elementary ELA: Reading Comprehension
- Elementary ELA: Text Analysis
- Elementary ELA: Resource Selection & Classroom Management
- Elementary ELA: Writing Skills
- Elementary ELA: Language Structure, Meaning & Figurative Interpretation
- Elementary ELA: Speaking & Listening Skills
- Elementary Math: Curriculum Concepts
- Elementary Math: Number Concepts & Operations
- Elementary Math: Rounding & Estimation
- Elementary Math: Decimals, Fractions & Percents
- Elementary Math: Proportional Relationships & Number Theory
- Elementary Math: Algebraic Concepts
- Elementary Math: Measurement Concepts
- Elementary Math: Statistics, Data & Probability
- Elementary Science: Curriculum Concepts
- Elementary Science: Inquiry & Processes
- Elementary Science: Life Science & Ecology
- Elementary Science: Earth & Space Science
- Elementary Science: Physical Science
- Elementary Science: Health
- Elementary Social Studies: Curriculum Concepts
- Elementary Social Studies: Information Processing Skills
- Elementary Social Studies: Geography
- Elementary Social Studies: History
- Elementary Social Studies: Economics
- Elementary Social Studies: US Government
- Elementary Social Studies: Anthropology & Sociology
- Elementary Music Instruction
- Elementary Art Instruction
- Elementary Physical Education Instruction
- Elementary Education Assessments