Three Dimensional Shapes — Cube, Cuboid, Cylinder and Sphere | Primary 1 Mathematics 3rd Term Week 10

Subject: Mathematics (Numeracy) | Class: Primary 1 | Term: 3rd Term | Week: 10

Previous Lesson: Two Dimensional Shapes — Week 9

Learning Objectives

1. Sort 3-dimensional objects into cubes, cuboids, cylinders and spheres.
2. Identify and name 3-dimensional objects.
3. Distinguish between cubes and cuboids.
4. Name objects in the environment that are 3-dimensional shapes.

Lesson 1 — What Are 3D Shapes?

Three-dimensional (3D) shapes are solid objects you can pick up, touch, and move around. They have length, width, and height.

Lesson 2 — Types of 3D Shapes

Shape	Properties	Examples in Environment
Cube	6 equal square faces, 8 corners, 12 equal edges	Dice (ludo), sugar cube, ice cube
Cuboid	6 rectangular faces (opposite faces equal), 8 corners, 12 edges	Matchbox, brick, shoe box, packet of sugar
Cylinder	2 circular faces (top and bottom), 1 curved surface	Tin of Milo, tin of tomato, candle, bottle
Sphere	Perfectly round, no flat faces, no edges or corners	Football, orange, ball, globe

Lesson 3 — Cube vs Cuboid

Cube	Cuboid
All 6 faces are equal squares	Faces are rectangles (not all equal)
All edges are equal	Edges are of different lengths
Example: dice, sugar cube	Example: matchbox, chalk box

Counting Activity — Numbers 241–250

241

242

243

244

245

246

247

248

249

250

Lesson Evaluation

1. Name four types of 3D shapes.
2. What is the difference between a cube and a cuboid?
3. Name two objects at home shaped like a cylinder.
4. Name two objects shaped like a sphere.

Next Lesson: Everyday Statistics — Pictogram — Week 11