Rectangular Prism and Cube

Mathematics Grade 6 Difficulty 2/5

Beginning of the lesson

📦 Rectangular Prism and Cube

Exploring 3D Shapes: From Boxes to Perfect Cubes

1. What is a Rectangular Prism?

A rectangular prism (прямоугольный параллелепипед) is a 3D shape with:

Six rectangular faces (flat surfaces)
All angles are right angles (90°)
Opposite faces are equal rectangles
Also called cuboid or rectangular parallelepiped

Think of it as: A box shape - like a shoebox, a brick, or a book!

Interactive visualization — available in the full lesson

Interactive 3D Rectangular Prism - Drag to rotate!

2. Elements of a Rectangular Prism

Faces (Грани)

6

Flat rectangular surfaces

Rectangles

Edges (Рёбра)

12

Line segments where faces meet

Line Segments

Vertices (Вершины)

8

Corner points

Points

Interactive visualization — available in the full lesson

Blue = Faces Orange = Edges Red = Vertices

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In the full lesson

The complete explanation
Worked examples
Common mistakes and how to avoid them
Test questions: 104
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