LC DCG study guide
LC DCG · Work through your exam, one topic at a time.
Design and Communication Graphics (DCG) is the Leaving Certificate subject that develops graphical communication, spatial reasoning and computer-aided design skills. It suits students who enjoy precise drawing, visual problem solving and design work, and it is often taken alongside subjects such as Mathematics, Physics, Construction Studies or Engineering. The LC DCG study guide has 6 sections and about 2,144 words.
01Graphical Communication and Technical Drawing
This domain tests the drawing conventions that let a design be manufactured or built without verbal explanation. In Design and Communication Graphics it covers sheet layout, linework, lettering, scale, orthographic projection, sections, dimensions and freehand communication.
367 words, about 2 min02Descriptive Geometry: Orthographic and Auxiliary Projection
This domain tests spatial reasoning: finding true lengths, true shapes, inclinations, traces and intersections that are foreshortened in the principal views. Auxiliary projection is the main tool for solving these problems without calculation.
367 words, about 2 min033D Modelling and CAD
This domain tests whether you can build and document a model with design intent, not just draw something that looks right. It covers sketch constraints, feature-based solid modelling, assemblies, drawing extraction, rendering and file exchange.
346 words, about 2 min04Design and Problem Solving
This domain tests the evidence trail from a brief to a justified solution. It is not enough to produce an attractive object; the exam looks for problem definition, research, specification, iteration, evaluation and clear communication.
324 words, about 2 min05Applied Graphics and Design
This elective tests graphics as a design communication tool: perspective, shade and shadow, presentation composition and computer-generated presentation. The aim is to make a proposed form readable before it is built.
366 words, about 2 min06Geometry and Trigonometry Applications
This domain tests the use of geometry and trigonometry to solve practical two- and three-dimensional problems: roofs, frames, mechanisms, circular features, surveying and coordinate layouts. The marks are for correct selection and clear application, not for formula recall alone.
374 words, about 2 min