DCG Revision - Interpentration of Solids

This week we're going to focus on Interpenetration of Solids. In essence this topic is about finding the Orthographic Views of a solid cutting through another solid. The ultimate aim of Interpenetration of Solids questions is to find the Line/s of Interpenetration. This topic can come up on the exam as a short question in Section A or a long question in Section B. There are four different methods to solve these problems:
  1. Limits Method - Auxiliary Views
  2. Radial Elements Method - Cones and Pyramids
  3. Horizontal Section Method - Universal
  4. Vertical Section Method - Universal

You need to know all of the above methods as you can be asked to use a specific method in the exam.
 

Syllabus Learning Outcomes (NCCA, 2006)

What you Need to Know!

Ordinary Level

  • Limits Method (No Auxiliary View)
  • Radial Elements Method
  • Horizontal Section Method
  • Vertical Section Method

Higher Level

  • Using Auxiliary Plans to find Line of Interpenetration

Practice Textbook Questions (Anderson, 2014)

  1. P188 Q4
  2. P189 Q6
  3. P190 Q10

Past Exam Paper Questions

  1. 2017 HL B-1
  2. 2016 HL B-3
  3. 2013 HL A-2
  4. 2012 HL B-2

References

NCCA (2006). Leaving Certificate Design and Communication Graphics Syllabus. Dublin: The Stationary Office.
Anderson, D. (2014). Graphics in Design and Communication: One Volume Edition. Dublin: Gill & Macmillan.