Lesson Notes By Weeks and Term v5 - Grade 2
Space and shape: more 2D shapes and 3D objects – Week 6 focus
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Space and shape: more 2D shapes and 3D objects – Week 6 focus
Download the Lessonotes Mobile South Africa app for faster lesson access on Android and iPhone.
Subject: Mathematics
Class: Grade 2
Term: 3rd Term
Week: 6
Theme: General lesson support
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Introduction This week, we continue our exciting journey into the world of Space and Shape. We will move from looking at "flat" shapes (2D) to exploring "fat" objects (3D) that we can pick up and hold. Understanding 3D objects is very important because our world is full of them! From the soccer ball we kick at break time, to the lunchbox holding our sandwiches, to the shape of a traditional rondavel house, 3D objects are all around us. By learning to identify, name, and describe these objects, learners develop their spatial awareness and geometric reasoning.
This section provides the core knowledge for the week. We will build on our understanding of 2D shapes to explore the 3D objects they help to form. A. From 2D Shapes to 3D Objects What is the difference? 2D Shapes are flat. We can draw them on paper. Examples are circles, squares, triangles, and rectangles. 3D Objects are fat. They are not flat; we can pick them up and hold them. They take up space. B. Key 3D Objects and their Properties We will focus on five main types of 3D objects.
Sphere (Ball Shape)
Description: A sphere is perfectly round like a ball. It has no flat surfaces at all. It only has one, big, continuous curved surface.
Why it's important: Because it has no flat surfaces, a sphere can roll easily in any direction. It cannot slide. South African
Examples: A soccer ball or a netball. An orange or a naartjie. Marbles (goli) that we play with.
Prism (Box Shape)
Description: Prisms are objects that look like boxes. All their surfaces are flat. These flat surfaces are called faces. A very special prism where all the faces are squares is called a cube.
Why it's important: Because it only has flat surfaces, a prism can only slide. It cannot roll. The flat faces are shapes like squares and rectangles. South African
Examples: A box of Ouma rusks (a rectangular prism). A brick used to build a house. A lunchbox. A dice (a cube).
Cylinder (Can Shape)
Description: A cylinder is a special object with two flat faces that are perfect circles, and one curved surface that goes all the way around.
Why it's important: A cylinder is interesting because it can both roll and slide.
How it slides: If you put it on one of its flat, circular ends, it will slide.
How it rolls: If you lay it on its side (on the curved surface), it will roll. South African
Examples: A can of Koo beans or chakalaka. A toilet paper roll. The base of a traditional rondavel house. A drinking glass.
Cone Description: A cone has one flat face that is a circle (its base). It also has one curved surface that comes up to a sharp point.
Why it's important: Like a cylinder, a cone can both roll and slide.
How it slides: It can slide on its flat circular base.
How it rolls: It can roll on its curved side, but it will roll in a circle! South African
Examples: An ice-cream cone. A party hat. A traffic cone you see on the road. The roof of a traditional rondavel house.
Pyramid Description: A pyramid has a flat bottom, called a base, which can be a square or a triangle. The other faces are triangles that all meet at one point at the top.
Why it's important: A pyramid has only flat surfaces, so it can only slide. It cannot roll. South African
Examples: While not common in everyday life, we see pyramids in pictures from Egypt. Some modern buildings or roofs might have a pyramid shape. C. Linking 2D Shapes and 3D Objects The flat surfaces (faces) of 3D objects are our familiar 2D shapes!