🌟 Miss Brenda's Grade 4 Math Class 🌟

🎲 What is a Cube?

A **cube** is a three-dimensional solid shape with:

6 faces — all are perfect squares and the same size
12 edges — all edges are the same length
8 vertices (corners)

📋 Properties of a Cube

A Cube Has:

• 6 square faces
• 12 equal edges
• 8 corners (vertices)
• All angles are right angles (90°)
• It is a special type of rectangular prism

🌍 Cubes in Real Life

• Dice (used in board games)
• Sugar cubes
• Some ice cubes
• Rubik’s Cube
• Many gift boxes and storage boxes
• Some buildings have cube-shaped parts

🔢 Faces, Edges and Vertices

Faces: 6 flat surfaces (all squares)
Edges: 12 straight lines where faces meet
Vertices: 8 points where edges meet (corners)

✏️ Let’s Practice Together, My Dear Student!

Practice 1

1. How many faces does a cube have? 6
2. How many edges does a cube have? 12
3. How many corners (vertices) does a cube have? 8

Practice 2: True or False

1. All faces of a cube are rectangles → False (they are squares)
2. A cube has 12 edges → True
3. A Rubik’s Cube is made of smaller cubes → True

Practice 3: Word Problems (Canadian Style)

1. A big cube-shaped box has edges of 50 cm. What is the length of all its edges combined?
12 × 50 cm = 600 cm

2. You have 8 small sugar cubes. If you put them together to make one bigger cube, how many small cubes are on each edge?
2 small cubes on each edge (2×2×2 = 8)

Challenge Question

How is a cube different from a rectangular prism?
In a cube, all edges are the same length. In a rectangular prism, the edges can be different lengths.

Fantastic Job, My Dear Student! 🎉

You now understand cubes very well! They are perfect, strong shapes that we see in many places.

I am so proud of you for learning 3D shapes. Look for cubes around your house — like dice, boxes, or even ice cubes!

💕 You are smart. You are kind. You can do hard things.