Third Term Lesson Note for Week Ten
Class : Primary 2
Subject : Mathematics
Topic : Three dimensional shapes
Duration : 80 minutes
Period : Double Periods
Reference Book :
- New Method Mathematics for Primary Schools, Book 2.
- Lagos State Unified Schemes of Work for Primary Schools, (Primary 1 – 3).
- Online Resources
Instructional Material : Chart showing examples of 3-Dimensional shapes.
Learning Objectives : By the end of the lesson learners will be able to
i. Define the 3-Dimensional Shapes.
ii. Identify the 3-Dimensional shapes and give examples
Previous Knowledge : Learners are familiar with 2-dimensional shape or plane shapes.
Content :
A 3-Dimensional shape is a solid Shape with three sides, that is length, width and height.
It is formed by joining two or more plane shapes together. It can also called 3-D shapes.
Examples of 3-D shapes are cube, cuboid, cylinder, cone, pyramid, prism, etc.
The 3-Dimensional Shapes have flat faces, edges and vertices (corners).
I. Face : A face is made up of a plane shape which could be square, rectangle or circle.
II. Edges : These are lines that makes up or forms the shape.
III. Vertices: This is also known as corners or points where the edges are joined together. It can also be called angles.
Features of cubes and cuboids
Cube :
- It has 6 flat faces
- It has 12 edges
- It has a vertices(corners)
- It has a square face.
- Examples of cubes are cubes of sugar, cubes of maggi and ludo dice
Cuboids :
- It has 6 flat faces
- It has 12 edges
- It has 8 vertices
- It has a rectangular face.
- Examples of cuboids are mathematical set, toothpaste box, match box, e.t.c.
Identification of number of faces, edges and vertices in a cube and cuboid.
Take a cube of sugar and matchbox
Count the number of flat faces that both objects have.
How many flat faces do the objects have?
The cube of sugar and matchbox both have 6 flat faces.
Count the number of edges of cube of sugar and match box
How many edges do the objects have?
The cube of sugar and matchbox both have 12 edges
Count the number of vertices the cube of sugar and matchbox
How many vertices do the objects have?
The cube of sugar and matchbox both have 8 vertices
Presentation Steps :
Step 1 : Revises the previous lesson learnt with the learners by asking questions.
Step 2 : Introduces the new topic by defining 3-D shapes and gives several examples.
Step 3 : Describe some of their features with examples such as faces, egdes and vertices.
Evaluation Questions :
Copy and complete each of the following statement
1.A cube and cuboid each have
a) ___________________faces
b) ___________________edge
c) ___________________vertices
2. Each face of cube is __________________
3. Each face of cuboid is ___________________
4. List two objects in your environment that are cubes :
i. __________________ ii. _________________
5.Name two objects in your environment that are cuboids :
i. __________________ ii. __________________
Conclusion : At the end of the lesson learners were able to answer the questions correctly.