# Ch 2: Geometry for Elementary School

### About This Chapter

## Geometry for Elementary School - Chapter Summary

Working with shapes, triangles, angles and the like becomes fun and easy for students using this convenient and adaptable resource as a supplement to regular classroom instruction. Teachers can also apply this resource to help students with homework, test preparation and review and more. The lessons are informative and interesting despite their brevity, and the quizzes, worksheets and chapter tests provide plenty of practice, reinforcement and measurement of your students' success.

## Who It's For

Kids who need extra help with geometry will benefit from the lessons in this chapter. There's no faster or easier way to learn about geometry.

- Students who have fallen behind in understanding problems involving geometric shapes
- Students with learning disabilities or need a little extra help learning about triangles, surface area and angles
- Students who prefer multiple ways of learning mathematics (visual or auditory)
- Students who have missed class and need to catch up
- Students who need an efficient and convenient way to learn about geometry
- Students who struggle to understand their geometry teachers
- Students who attend schools without extra mathematics resources

## How It Works

- Find lessons in the chapter that cover geometry topics your student needs to learn or review.
- Press play and watch the video lesson with your student or read through the text lesson.
- Refer to the video transcripts and highlighted vocab words to reinforce learning about geometry.
- Test your student's understanding of each lesson with short quizzes.
- Verify your student understands geometry by completing the Geometry for Elementary School chapter exam.

### 1. Surface Area Lesson for Kids

This lesson explains surface area. You will learn how to use length and width to calculate the areas of the surfaces of an object and add them all together to find the total surface area.

### 2. Types of Angles: Lesson for Kids

In this lesson, you will meet Natalie, a fourth-grade student who uses a clock and her schedule to discover different types of angles. By the end of this lesson, you will know what an angle is and how to identify the four different types of angles.

### 3. Types of Triangles: Lesson for Kids

In this lesson, you will learn about the three different types of triangles, which are scalene, isosceles, and equilateral. We will discuss how to identify each type of triangle.

### 4. Geometric Shapes: Lesson for Kids

You already know simple shapes like squares, circles, triangles, and rectangles. Did you know that all but one of those shapes is a polygon? If you want to know more about other shapes, you've come to the right place!

### 5. Isosceles Triangle Lesson for Kids

How do you think pizza and hangers relate to triangles? Read this lesson and you will find out what a triangle is. You also will learn about one type of triangle called an isosceles triangle.

### 6. How to Use a Protractor: Lesson for Kids

This lesson will teach you what a protractor is and how to use one. It will show you how to line a protractor up correctly, read the measurements, and determine which measurement is correct.

### 7. 3-D Shapes: Lesson for Kids

This lesson describes what 3-dimensional shapes are and how they are defined. It will also give plenty of pictures and hints on how to remember what each shape is called. Take a look to learn all about 3D shapes!

### 8. Pentagon Shapes: Lesson for Kids

In this lesson, you will learn what a pentagon is and be able to define it with math terms. You will also be able to describe pentagons as either regular or irregular polygons.

### 9. Polygon Shapes: Lesson for Kids

In this lesson, we'll discuss the mathematical term called polygons. You'll learn how to identify and classify polygons, as well as discover the names and types of several polygons.

### 10. Diamond Shapes: Lesson for Kids

Diamond shapes have many interesting attributes. In this lesson, we'll explore the diamond shape and learn about its properties, as well as the various places they show up in real life.

### 11. Measuring Angles: Lesson for Kids

Get ready to wrangle up some angles! We can find angles everywhere. In this lesson, you will learn about types of angles and how to measure them with a protractor.

### 12. Circle Definition: Lesson for Kids

In today's lesson, we'll talk about circles. Read on to learn what a circle is, what a circle looks like, and why circles are important. Then, test your knowledge with a fun activity and a short quiz.

### 13. Circumference Lesson for Kids: Definition & Formula

In this lesson, you will learn what circumference is, its formula and the tools you need to find circumference. Then, you can try finding the circumference of a circle on your own!

### 14. Cubes: Lesson for Kids

The world is made up of many different types of shapes. In this lesson, we will focus on the cube and what makes it such a special three-dimensional shape.

### 15. Properties of a Circle: Lesson for Kids

You come across so many shapes every day, and one of the most unique is the circle. This simple shape plays a huge role in our lives. In this lesson, you will learn about the parts of a circle!

### 16. Rectangle Definition: Lesson for Kids

In this lesson, we'll review the geometric shape of a rectangle. We'll discuss the definition and characteristics of rectangles. You'll also learn how to tell the difference between rectangles and other four-sided shapes.

### 17. Triangle Lesson for Kids: Definition & Facts

Triangles may be a simple shape but there are lots of different types! In this lesson, we will clearly define a triangle and think about some of the different kinds of triangles.

### 18. 2-D Shapes: Lesson for Kids

What do rectangles, triangles and circles have in common? They're two-dimensional shapes! In this lesson, you'll learn what 2D shapes are and how to identify them.

### 19. How to Find the Area of a Triangle: Lesson for Kids

Look around you; measurements are everywhere! We measure the length and height of things all the time. The area of a shape is another important measurement to understand. In this lesson, we will explore the steps to finding the area of triangles.

### 20. How to Find the Volume of a Cylinder: Lesson for Kids

When you wake up in the morning, you may fill a glass with orange juice, water or milk. If so, you are already using a cylinder and dealing with volume. In this lesson, we will learn to calculate the volume of cylinders.

### 21. Pentagon Shape Facts: Lesson for Kids

Find out all kinds of interesting facts about the five-sided shape called the pentagon! Learn about this shape, the different types of pentagons, examples of pentagons and why it's called a pentagon.

### 22. Vertices: Lesson for Kids

Vertices are everywhere! Geometry includes lines, shapes, and solid figures, and all of these can make or have vertices. In this lesson, learn the definition of a vertex and the different ways we can identify and describe vertices in geometry.

### 23. What is a Regular Polygon? - Lesson for Kids

What is a regular polygon? If you do not know, you have come to the right place! In this lesson, you will learn how to spot a regular polygon in a lineup!

### 24. Pythagorean Theorem Proof: Lesson for Kids

Did you know that we can use art and math together? In this lesson, we will use one picture to prove the famous Pythagorean Theorem! Join me to see how this Pythagorean Theorem Proof works with art.

### 25. Pythagorean Theorem Lesson for Kids: Definition & Examples

An important part of geometry is knowing how to measure shapes. The Pythagorean Theorem is used in the measurement of triangles. In this lesson, you will learn the Pythagorean Theorem and how to use it. Then you will practice on a triangle of your own.

### 26. How to Find the Perimeter of a Regular Pentagon

In this lesson, you'll learn how to find the perimeter of a regular pentagon in two different ways. You'll also discover how to tell the difference between a regular and an irregular pentagon.

### 27. Is a Pentagon a Regular Polygon?

Math involves not just numbers, but also shapes. In this lesson, we will look at the two types of polygons, regular and irregular, and use that information to figure out what type of polygon a pentagon is.

### 28. Geometry Definition: Lesson for Kids

Geometry is a very interesting topic in mathematics. We will learn the definition of geometry in this lesson. We will also look at some real life examples of geometry!

### 29. Names of Polygons

When your mom stops at a stop sign, what shape is it? When you slide into home plate, what shape is the base? Everywhere we look, we can see shapes called polygons. This lesson will teach you what a polygon is and what named we give them.

### 30. What is a Venn Diagram? - Lesson for Kids

Have you ever had to compare and contrast two different things? If so, you could have used the help of the Venn diagram. In this lesson, we'll discuss the Venn diagram and look at examples of this useful tool.

### 31. Triangle Sum Theorem Proof

In this lesson, you'll learn about the triangle sum theorem proof, as well as the special trait all triangles share that can help you find missing angles in geometry problems.

### 32. Facts About Right Angles

A right angle is a special kind of angle. All right angles are the same, no matter how long their sides are. They are commonly found around the house, school, store, and neighborhood. After this lesson, you will see right angles everywhere!

### 33. Octagon Lesson for Kids: Definition & Facts

You see octagons every day, but can you identify one when you see it? In this lesson, you will learn about octagons. Definition, features, and interesting facts will be discussed.

### 34. Hexagon Lesson for Kids: Definition & Facts

A hexagon is a polygon that has six sides and six angles. In this lesson, you'll learn how to identify a hexagon, including the different types, as well as where to find some examples in everyday life.

### 35. Perimeter Lesson for Kids: Definition & Examples

There are many types of measurement you need to learn. In this lesson, you'll learn the definition of perimeter and how to find the perimeter of a variety of shapes.

### 36. 4-Sided Polygons

We are shaping up and talking about quadrilaterals. In this lesson, you'll learn about the different kinds of four-sided polygons and their properties. Let's see if we can keep them all straight!

### 37. Dodecahedron: Definition & Facts

What do you call a shape with 12 sides that looks like a deflated soccer ball? A dodecahedron of course! In this lesson you will learn all about this special 3-D shape.

### 38. Special Right Triangles: 3-4-5 Triangle

After completing this lesson, you will be able to identify and describe the characteristics of a 3-4-5 right triangle and use the Pythagorean Theorem. You will also be able to discuss situations where 3-4-5 right triangles would be useful.

### 39. Triangle Sum Theorem: Definition & Examples

In this lesson, we will learn about the Triangle Sum Theorem. We will also look at how useful the Triangle Sum Theorem is when looking for missing angle measurements inside of a triangle.

### 40. Dodecahedron: Patterns & Properties

This lesson is all about dodecahedrons! Did you know that you can create your own dodecahedron at home? So, what is a dodecahedron?! Now, let's go have some fun and learn about this new math term!

### 41. Finding the Area of an Irregular Hexagon

Finding the areas of shapes is an important part of geometry. Area is used in math and science as well as in architecture and interior decorating. In this lesson, we'll learn how to find the area of an irregular hexagon.

### 42. How to Divide an Angle into Two Equal Angles

In this lesson, we will learn how to divide an angle into two equal parts. After seeing the steps to solve this type of problem, we will talk a bit about some real world situations in which this type of problem may arise.

### 43. What is a Congruent Angle? - Lesson for Kids

This lesson is all about congruent angles. You will learn what 'congruent' means, what a congruent angle is and how to tell if one angle is congruent to another angle.

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### Other Chapters

Other chapters within the Math for Kids course

- Numbers for Elementary School
- Fractions for Elementary School
- Math Basics for Elementary School
- Statistics for Elementary School
- Number Properties for Elementary School
- Algebra for Elementary School
- Math Patterns for Elementary School
- History of Math for Elementary School
- Math Terms for Elementary School
- Working with Numbers for Elementary School
- Types of Numbers for Elementary School
- Measurements for Elementary School
- Working with Data for Elementary School
- Representing Numbers for Elementary School
- Types of Data for Elementary School
- Math Strategies for Elementary School
- Fraction Operations for Elementary School
- Shapes for Elementary School
- Negative Numbers for Elementary School
- Decimals for Elementary School
- Lines & Angles for Elementary School
- Multiplication for Elementary School