Lecture Notes: Plans and Elevations

Introduction

• Topic: Plans and Elevations
• Goal: Understand how to view and describe a 3D object from different perspectives.
• Key concepts: Plan (top view), Front elevation (front view), Side elevation (side view).

Understanding Views

• Plan View: Looking at an object from above.
• Front Elevation: Viewing the object from the front.
• Side Elevation: Observing the object from the side.

Steps to Representing a 3D Object

1. Front Elevation

   • Stand facing the object.
   • Observe only the visible side.
   • Example: Sketch on graph paper.
   • Measure dimensions precisely (e.g., base of 6 cm, height of 4 cm).

2. Side Elevation

   • Move to the side of the object.
   • Recognize visible sides (rectangles one above another).
   • Consider dimensions (e.g., width of 4 cm, height of 4 cm for each step).

3. Plan View

   • Position above the object.
   • Look down to see the top surfaces.
   • Example: Both steps appear as rectangles from above.
   • Calculate dimensions (e.g., top step is 3 cm by 4 cm).

Practical Example

• First Shape:

  • Front elevation: Draw the visible side.
  • Side elevation: Consider the rectangles of the steps.
  • Plan: View the top surfaces.

• Second Shape:

  • Front elevation: Identify visible triangle.
  • Side elevation: Observe rectangle dimensions (5 cm by 8 cm).
  • Plan: Sketch rectangle from above (5 cm by 6 cm).

Practice Advice

• Observe everyday objects at different angles to practice identifying views.

Conclusion

• Encourage exploration of objects from various perspectives.
• Suggestions for future topics and engagement.

Note: Practicing with real objects around your environment can help solidify understanding of these concepts.