# Distinguishing Between 2D and 3D Shapes Primary 4 Third Term Lesson Notes Mathematics Week 10

### Detailed Lesson Plan: Distinguishing Between 2D and 3D Shapes

**Subject:** Mathematics

**Class:** Primary 4

**Term:** Third Term

**Week:** 10

**Topic:** Distinguishing Between 2D and 3D Shapes

**Sub-topic:** Understanding and Identifying Properties of 2D and 3D Shapes

**Duration:** 60 minutes

**Behavioural Objectives:**

By the end of the lesson, students should be able to:

- Identify 2D and 3D shapes.
- Understand the properties of 2D and 3D shapes.
- Recognize examples of real-life objects representing 2D and 3D shapes.

**Key Words:**

- 2D shapes
- 3D shapes
- Length
- Width
- Depth
- Faces
- Edges
- Vertices

**Entry Behaviour:**

Students have basic knowledge of common shapes such as squares, circles, and cubes.

**Learning Resources and Materials:**

- Flashcards with pictures of 2D and 3D shapes
- Real-life objects (e.g., books, balls, boxes)
- Drawing paper and pencils
- Rulers
- Lagos State Scheme of Work

**Building Background / Connection to Prior Knowledge:**

- Review common shapes and their names.
- Discuss how students use these shapes in daily life.

**Embedded Core Skills:**

- Critical thinking
- Observation
- Comparison
- Real-life application

**Learning Materials:**

- Flashcards
- Real-life objects
- Drawing materials

**Reference Books:**

- Lagos State Scheme of Work for Primary 4 Mathematics

**Instructional Materials:**

- Flashcards
- Real-life objects
- Drawing materials

**Content:**

**Definition of 2D and 3D Shapes****Properties of 2D Shapes (Length and Width)****Properties of 3D Shapes (Length, Width, and Depth)****Examples of 2D and 3D Shapes in Real Life**

**Presentation:**

### Understanding 2D and 3D Shapes

**Learning Objectives:**

- Identify and distinguish between 2D shapes and 3D shapes.
- Understand the properties of three-dimensional shapes.
- Recognize examples of real-life objects representing 2D and 3D shapes.

### 2D Shapes (Two-Dimensional) ✏️

**Definition:**- Flat shapes that have length and width but no depth.

**Properties:****Length**and**width**only.- Can be drawn on paper.

**Examples:****Square:**🟦**Rectangle:**🟥**Triangle:**🔺**Circle:**⚪

**Real-life Examples:****Square:**Chessboard, window.**Rectangle:**Book, door.**Triangle:**Road sign, slice of pizza.**Circle:**Clock, coin.

### 3D Shapes (Three-Dimensional) 📦

**Definition:**- Solid shapes that have length, width, and depth.

**Properties:****Length, width,**and**depth**(height).- Can be held and touched.

**Examples:****Cube:**🟫**Cuboid:**📦**Sphere:**⚽**Cylinder:**🥤**Cone:**🍦**Pyramid:**🎪

**Real-life Examples:****Cube:**Dice, Rubik’s cube.**Cuboid:**Box, refrigerator.**Sphere:**Basketball, globe.**Cylinder:**Can of soda, candle.**Cone:**Ice cream cone, traffic cone.**Pyramid:**Egyptian pyramid, toy block.

### Summary

**2D shapes**are flat and only have length and width (e.g., squares, circles).**3D shapes**are solid and have length, width, and depth (e.g., cubes, spheres).**Real-life examples**help us recognize these shapes in our everyday environment.

Evaluation on the topic of distinguishing between 2D shapes and 3D shapes for Primary 4 pupils:

- A circle is a __________ shape. a) 2D

b) 3D

c) both

d) none - A cube has __________ faces. a) 4

b) 6

c) 8

d) 10 - A rectangle is a __________ shape. a) 2D

b) 3D

c) both

d) none - A sphere is a __________ shape. a) 2D

b) 3D

c) both

d) none - A square has __________ sides. a) 2

b) 3

c) 4

d) 5 - A cylinder has __________ faces. a) 1

b) 2

c) 3

d) 4 - A triangle is a __________ shape. a) 2D

b) 3D

c) both

d) none - A cone has __________ face. a) 1

b) 2

c) 3

d) 4 - A circle has __________ sides. a) 1

b) 2

c) 3

d) 0 - A cuboid is a __________ shape. a) 2D

b) 3D

c) both

d) none - A square is a __________ shape. a) 2D

b) 3D

c) both

d) none - A sphere has __________ edges. a) 0

b) 1

c) 2

d) 3 - A pyramid has a __________ base. a) round

b) triangular

c) square

d) oval - A book is an example of a __________. a) cube

b) cuboid

c) sphere

d) cone - A clock face is an example of a __________ shape. a) 2D

b) 3D

c) both

d) none

Class Activity Discussion on distinguishing between 2D shapes and 3D shapes, suitable for Primary 4 pupils:

**Q: What is a 2D shape?****A:**A 2D shape is flat and has length and width but no depth.

**Q: What is a 3D shape?****A:**A 3D shape is solid and has length, width, and depth.

**Q: Can you give an example of a 2D shape?****A:**Yes, a circle is a 2D shape.

**Q: Can you give an example of a 3D shape?****A:**Yes, a cube is a 3D shape.

**Q: What are the properties of a rectangle?****A:**A rectangle has four sides and four right angles, and it is a 2D shape.

**Q: What are the properties of a cuboid?****A:**A cuboid has six faces, twelve edges, and eight vertices, and it is a 3D shape.

**Q: How many sides does a triangle have?****A:**A triangle has three sides.

**Q: How many faces does a sphere have?****A:**A sphere has one curved face and no edges or vertices.

**Q: Is a square a 2D or 3D shape?****A:**A square is a 2D shape.

**Q: Is a cylinder a 2D or 3D shape?****A:**A cylinder is a 3D shape.

**Q: What is an example of a 2D shape in real life?****A:**A piece of paper is an example of a 2D shape.

**Q: What is an example of a 3D shape in real life?****A:**A ball is an example of a 3D shape.

**Q: How many edges does a cube have?****A:**A cube has twelve edges.

**Q: How many sides does a hexagon have?****A:**A hexagon has six sides.

**Q: What are the properties of a cone?****A:**A cone has one flat circular base, one curved surface, and one vertex. It is a 3D shape.

**Step 1: Revision of the Previous Topic (10 minutes)**

- The teacher revises the previous topic on basic shapes.
- Questions to ask:
- What is a square?
- Can you name a round shape?
- What shape is a book?

**Step 2: Introduction of the New Topic (15 minutes)**

- The teacher introduces the new topic by showing flashcards of 2D and 3D shapes.
- Explain that 2D shapes are flat and have only length and width (e.g., square, circle).
- Explain that 3D shapes are solid and have length, width, and depth (e.g., cube, sphere).
- Show real-life examples for better understanding.

**Step 3: Student Contributions and Corrections (15 minutes)**

- The teacher asks students to name more examples of 2D and 3D shapes.
- Students share their examples and discuss.
- The teacher corrects any misconceptions and reinforces learning with more examples.

**Teacher’s Activities:**

- Show and explain the flashcards.
- Use real-life objects to demonstrate 2D and 3D shapes.
- Ask questions to engage students.

**Learners’ Activities:**

- Observe the flashcards and real-life objects.
- Answer questions and provide examples.
- Participate in discussions.

**Assessment: (10 minutes)**

- Students complete a worksheet with fill-in-the-blank and multiple-choice questions.
- The teacher assesses understanding through their answers and participation.

**Evaluation Questions:**

- A square is a __________ shape.
- a) 2D
- b) 3D

- A ball is an example of a __________ shape.
- a) 2D
- b) 3D

- How many faces does a cube have?
- a) 4
- b) 6

- A triangle has __________ sides.
- a) 2
- b) 3

- A book is an example of a __________.
- a) cube
- b) cuboid

- How many edges does a cylinder have?
- a) 0
- b) 2

- A circle is a __________ shape.
- a) 2D
- b) 3D

- A cone has __________ face.
- a) 1
- b) 2

- How many vertices does a pyramid have?
- a) 5
- b) 6

- How many sides does a hexagon have?
- a) 5
- b) 6

**Conclusion: (10 minutes)**

- The teacher goes around to check students’ work and provide feedback.
- Recap the main points of the lesson.
- Encourage students to identify shapes in their surroundings.

This lesson plan aims to help students clearly distinguish between 2D and 3D shapes by providing engaging, hands-on learning activities.

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