Grade 1
  1. Numbers and Counting  1.1. Counting to 10  1.2. Counting to 20  1.3. Counting to 50  1.4. Counting to 100  1.5. Writing Numbers 1 to 10  1.6. Writing Numbers 1 to 20  1.7. Writing Numbers 1 to 50  1.8. Writing Numbers 1 to 100  1.9. Reading Numbers 1 to 10  1.10. Reading Numbers 1 to 20  1.11. Reading Numbers 1 to 50  1.12. Reading Numbers 1 to 100  1.13. Comparing Numbers  1.14. Ordering Numbers  1.15. Odd and Even Numbers  1.16. Number Patterns  1.17. Skip Counting by 2s, 5s, and 10s  1.18. Understanding Zero
  2. Basic Addition and Subtraction  2.1. Understanding Addition  2.2. Addition Facts within 10  2.3. Addition Facts within 20  2.4. Adding Zero  2.5. Adding One More  2.6. Adding Two More  2.7. Adding Three More  2.8. Adding Using Pictures  2.9. Addition Word Problems  2.10. Understanding Subtraction  2.11. Subtraction Facts within 10  2.12. Subtraction Facts within 20  2.13. Subtracting Zero  2.14. Subtracting One  2.15. Subtracting Two  2.16. Subtraction Using Pictures  2.17. Subtraction Word Problems  2.18. Introduction to Doubles Facts  2.19. Introduction to Making 10
  3. Place Value and Number Sense  3.1. Understanding Tens and Ones  3.2. Counting by Tens  3.3. Place Value within 20  3.4. Place Value within 50  3.5. Place Value within 100  3.6. Reading and Writing Two-Digit Numbers  3.7. Comparing Two-Digit Numbers  3.8. Decomposing Numbers
  4. Measurement  4.1. Length  4.1.1. Comparing Lengths  4.1.2. Measuring with Non-Standard Units  4.1.3. Using Standard Units (Inches and Centimeters) in Length  4.2. Weight  4.2.1. Comparing Weights  4.2.2. Heavy and Light Objects  4.2.3. Introduction to Grams and Pounds  4.3. Capacity  4.3.1. Comparing Capacity  4.3.2. Full and Empty  4.3.3. Introduction to Liters and Milliliters  4.4. Time  4.4.1. Telling Time to the Hour  4.4.2. Telling Time to the Half Hour  4.4.3. Days of the Week  4.4.4. Months of the Year  4.4.5. Understanding Yesterday, Today, and Tomorrow  4.5. Money  4.5.1. Recognizing Coins  4.5.2. Counting Coins  4.5.3. Introduction to Dollar and Cents Symbols  4.5.4. Simple Addition and Subtraction with Money
  5. Geometry  5.1. 2D Shapes  5.1.1. Recognizing 2D Shapes  5.1.2. Drawing 2D Shapes  5.1.3. Naming 2D Shapes  5.1.4. Properties of 2D Shapes  5.1.5. Sorting 2D Shapes  5.1.6. Composing Simple Shapes  5.2. 3D Shapes  5.2.1. Recognizing 3D Shapes  5.2.2. Naming 3D Shapes  5.2.3. Properties of 3D Shapes  5.2.4. Sorting 3D Shapes  5.3. Position and Direction  5.3.1. Left and Right  5.3.2. Above and Below  5.3.3. Inside and Outside  5.3.4. Near and Far  5.3.5. In Front and Behind
  6. Patterns and Sorting  6.1. Recognizing Patterns  6.2. Extending Patterns  6.3. Creating Patterns  6.4. Sorting by Color  6.5. Sorting by Shape  6.6. Sorting by Size
  7. Data and Graphing  7.1. Introduction to Data  7.2. Collecting Data  7.3. Tally Marks  7.4. Bar Graphs  7.5. Picture Graphs  7.6. Interpreting Simple Graphs
  8. Fractions  8.1. Understanding Halves  8.2. Understanding Fourths  8.3. Dividing Shapes into Equal Parts  8.4. Identifying Equal and Unequal Parts

Grade 1 → Geometry → 3D Shapes ↓


Naming 3D Shapes


Welcome to the exciting world of 3D shapes! When we talk about 3D shapes, we are referring to shapes that have three dimensions: length, width, and height. Unlike 2D shapes that are flat, 3D shapes have depth. Imagine them as objects that you can touch, hold, or stack on top of one another.

What are 3D shapes?

3D shapes are also called solid shapes or geometric solids. They are present everywhere around us. The box your toys come in, the ball you play with, and even the ice cream cone, they are all 3D shapes.

Names and properties of basic 3D shapes

Let's take a look at some basic 3D shapes that you may already know. Each shape has different characteristics such as faces, edges, and vertices.

Cube

A cube is a shape that has six equal square faces. It looks like a dice. Every face is the same size.

  • Faces: 6 (all square)
  • Edges: 12
  • Zenith: 8

All sides of a cube are the same length. If you place the cube on any side, it can be balanced. Imagine a sugar cube!

Rectangular prism

A rectangular prism looks like a box or book. It has 6 faces, and each face is a rectangle.

  • Faces: 6 (rectangle)
  • Edges: 12
  • Zenith: 8

A rectangular prism may not have all sides equal like a cube, but opposite sides are equal.

Circle

A sphere is perfectly round like a ball. It has no edges or vertices.

  • Faces: 1 (curved)
  • Edges: 0
  • Zenith: 0

You can easily throw or roll a ball as it is completely smooth.

Cylinder

A cylinder has rounded ends and a curved face. Think of a soda can.

  • Faces: 2 (circular) + 1 (curved)
  • Edges: 2
  • Zenith: 0

The circular parts are called the base and the part that wraps around it is called the curved face.

Who?

A cone has a round base and a pointed top. Think of an ice cream cone.

  • Faces: 1 (circular base) + 1 (curved)
  • Edges: 1
  • top 1

The curved surface leads to the tip, which is the only vertex.

Understanding 3D shape characteristics

Let's look at some characteristics of 3D shapes:

  • Faces: These are the flat or curved surfaces on a figure. The faces of a cube are flat while the faces of a cylinder are curved.
  • Edges: These are the lines where two faces meet. A cube has 12 edges.
  • Vertices: These are the corners where the edges meet. A cube has 8 vertices.

Understanding these characteristics will help you identify and name 3D shapes easily. Let us discuss some examples in detail below.

How to identify 3D shapes in real life

3D shapes are all around us, and learning to recognize them can be fun! Here are some examples you may see every day:

  • Cube: The dice you play with or the Rubik's Cube.
  • Rectangular Prism: Cereal box or book.
  • Sphere: A basketball or globe.
  • Cylinder: A can of soda or a barrel.
  • Cone: An ice cream cone or a party hat.

Next time you look around, try to find different 3D shapes and name them with your friends or family.

Activities to learn 3D shapes

Here are some activities that can help you learn 3D shapes more effectively:

1. Size hunting

Walk around your home or classroom and make a list of objects that match the 3D shapes you learned. Write down the name of the object and the name of the shape that corresponds to it.

2. Build with blocks

If you have building blocks, use them to create different 3D shapes. You can also use paper or model clay to mold the shapes.

3. Creating 3D shapes

Draw 3D shapes using a pencil and ruler and create your own 3D shapes. You can use the simple SVG images above as models!

4. Story time

Write a short story with characters that are shapes. For example, a story about a little ball named Sally who rolls around Cube Town.

Learning through songs and poems

Memorizing 3D shapes with songs and poems can also be fun. Here is a simple solution for you:

    Cube, cube, is rolling on the floor,
    With six sides, there's even more to it!
    Sphere, sphere, so round and wide,
    Can you move it from side to side?
    Cone, cone, pointing to the sky,
    Sit on the base and reach up high.
    Cylinder, cylinder, standing so high,
    Rounded at the edges and flat where they fall.

Some songs and poems about shapes can help you remember and recognize them easily!

Interesting facts about 3D shapes

Did you know:

  • The word "sphere" comes from the Greek word "sphaira," meaning globe or ball.
  • Cubes are also called "regular hexahedrons".
  • The dice we use in board games are usually cubes.
  • The sphere has the smallest surface area for a given volume.

Conclusion

Now that you know more about 3D shapes, try looking for these shapes around you. Whether in your classroom, at home, or outside, 3D shapes are everywhere. Use what you've learned to identify them by their faces, edges, and vertices. Have fun finding shapes!


Grade 1 → 5.2.2


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Recognizing 3D Shapes
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Naming 3D Shapes

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