Class 8 Maths – Chapter 10

Visualising Solid Shapes

STEP 9: One-Page Formula & Concept Chart

📌 1. Dimensions

• 2D Shapes: Length & Breadth
• 3D Shapes: Length, Breadth & Height

📌 2. Faces – Edges – Vertices

• Face: Flat surface
• Edge: Line where two faces meet
• Vertex: Point where edges meet

📌 3. Common Solids & Properties

• Cube: 6 Faces, 12 Edges, 8 Vertices
• Cuboid: 6 Faces, 12 Edges, 8 Vertices
• Cylinder: 3 Faces, 2 Edges, 0 Vertices
• Cone: 2 Faces, 1 Edge, 1 Vertex
• Sphere: 1 Curved Face only

📌 4. Nets

A Net is a flat figure which can be folded to form a solid.

👉 Cube has many different nets.

📌 5. Views of Objects

• Top View
• Front View
• Side View

Same object looks different from different directions.

📌 6. Maps & Directions

• North, South, East, West
• Used to show position and movement

📌 7. Rotation

Rotation means turning an object about a fixed point.

👉 Shape and size do not change after rotation.

🎯 Exam Memory Tip

F-E-V Rule: Face → Edge → Vertex (Remember in order)