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Rectangular Parallelepiped (Cuboid)

Mathematics Grade 5 Difficulty 3/5

Beginning of the lesson

📦 Rectangular Parallelepiped (Cuboid)

Discover the fascinating world of 3D rectangular shapes!

What is a Rectangular Parallelepiped?

A rectangular parallelepiped (also called a cuboid or rectangular prism) is a 3D solid figure with:

  • 1 6 rectangular faces forming the surface
  • 2 All faces meet at right angles (90°)
  • 3 It's the 3D version of a rectangle
🇷🇺 Russian: Прямоугольный параллелепипед

Interactive 3D Cuboid

Interactive visualization — available in the full lesson

🖱️ Drag to rotate, scroll to zoom

🔍 Parts of a Rectangular Parallelepiped

Faces (Грани)

6

Rectangles forming the surface

  • Top & Bottom
  • Front & Back
  • Left & Right

Edges (Рёбра)

12

Segments where faces meet

  • 4 lengths
  • 4 widths
  • 4 heights

Vertices (Вершины)

8

Corner points where edges meet

  • 4 on top
  • 4 on bottom
  • 3 edges meet at each

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In the full lesson

  • The complete explanation
  • Worked examples
  • Common mistakes and how to avoid them
  • Test questions: 48
  • AI tutor that answers questions about the topic
  • Progress tracking for students, parents and teachers