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 ↓


Properties of 3D Shapes


Understanding the properties of 3D shapes is an important part of geometry. In this lesson, we will learn about the basic properties of common 3D shapes. These include cubes, spheres, cylinders, cones, and pyramids. Let's explore each of these shapes and discover their unique properties with detailed explanations and examples.

Cube

The cube is a special 3D shape that is very easy to recognize. It has six faces, and all the faces are squares of the same size. This means that all the edges of the cube are of the same length.

Properties of a Cube: - 6 faces - 12 edges - 8 vertices - All faces are square - All edges are equal in length

Here's a visual example of a cube:

Cubes are everywhere in our world! Dice, Rubik's Cube or even some boxes used in many games are cubes.

Sphere

A sphere is a spherical 3D shape, just like a ball. It is perfectly symmetrical and has no edges or vertices.

Properties of a Sphere: - 0 faces - 0 edges - 0 vertices - All points on its surface are the same distance from its center

Let's look at a simple diagram of a sphere:

Examples of spheres include basketballs, footballs, and globes.

Cylinder

A cylinder is a 3D shape with two parallel circular bases connected by a curved surface. It looks like a tin can.

Properties of a Cylinder: - 2 circular faces - 1 curved surface - 2 edges - 0 vertices

Here's a simplified illustration of a cylinder:

Cylinders can be seen in daily life in the form of soup cans, water bottles, and even some batteries.

Cone

A cone is a 3D shape with a circular base that gradually tapers to a point called the apex or vertex. It looks like an ice cream cone.

Properties of a Cone: - 1 circular face - 1 curved surface - 1 edge - 1 vertex

The structure of a cone is as follows:

Examples of cones include party hats, ice cream cones, and traffic cones.

Pyramid

A pyramid is a 3D shape with a polygonal base and triangular faces meeting at a point, known as the apex. There can be different types of pyramids depending on the shape of their base, such as a square pyramid, which has a square base.

Properties of a Pyramid (square base): - 5 faces (4 triangles, 1 square) - 8 edges - 5 vertices

Imagine this diagram of a pyramid:

Pyramids can be found in structures such as the Egyptian pyramids or the Louvre Pyramid in Paris.

Understanding faces, edges, and vertices

When discussing 3D shapes, it is important to understand what faces, edges, and vertices are:

  • A face is a flat or curved surface on a 3D shape. Think of the face of a cube as one side of a box.
  • The edge is where two faces meet. Imagine the edge as the line you touch when you run your finger over a box.
  • The vertex (plural: vertices) is the point where the edges meet. It's like the corner of a box.

Understanding these components will help you identify and classify different 3D shapes as you encounter them in both educational and real-world situations.

Conclusion

3D shapes are essential in learning space and geometry. Knowing their properties helps us understand the objects around us better. We can easily find examples in everyday life, making it fun and practical. Recognizing and defining shapes enhances our spatial awareness and mathematical base, which proves to be essential for further education.

Forever remember:

  • Cubes are boxes with equal sides.
  • Spheres are round like balls and have no corners.
  • Cylinders have rounded top surfaces and straight sides, like cans.
  • The cone has a rounded bottom that tapers to a point, like party hats.
  • Pyramids have a base that is connected to a point through triangular sides.

With this knowledge, you are now better equipped to recognize and understand the fascinating world of 3D shapes!


Grade 1 → 5.2.3


U
username
0%
completed in Grade 1

← Prev (5.2.2)
Naming 3D Shapes
Next (5.2.4) →
Sorting 3D Shapes

Comments 



Properties of 3D Shapes

https://www.buddymath.com/g1/5.2.3?bmal=en