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Leaving Cert Design & Communication Graphics Notes

Free Leaving Cert Design & Communication Graphics revision notes for Higher Level. Browse 16 topics and read online without an account.

16 topicsHigher LevelUpdated 27 Sept 2026
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Work through orthographic and auxiliary projection, conic sections, the oblique plane, interpenetration and developments, alongside perspective and dynamic mechanisms.

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AssembliesAssemblies is one of the five Applied Graphics options in Leaving Certificate Design & Communication Graphics.15 min readDynamic MechanismsMost of DCG deals with objects that stay still.15 min readGeological GeometryGeologic Geometry, also known as geological geometry, uses the principles of descriptive geometry—lines, planes, and intersections—to solve…14 min readStructural FormsStructural Forms investigates how geometric shapes provide strength, stability, and enclosure in architectural and engineering design.20 min readSurface GeometrySurface Geometry investigates the relationships, lines of intersection, and flat-pattern developments of three-dimensional surfaces found in sheet-metal…13 min readAxo / Di / Tri-Metric ProjectionAxonometric projection is an orthogonal pictorial drawing system that shows all three dimensions of an object in a single view.13 min readOrthographic & Auxiliary Projection +Orthographic and auxiliary projection forms the core graphic language of Leaving Certificate Design & Communication Graphics.18 min readPerspectivePerspective projection produces a pictorial drawing of a three-dimensional object showing how it appears to human vision from a fixed viewpoint.12 min readConic SectionsSlice a cone with a flat plane and the edge of the cut is a curve: an ellipse, a parabola, or a hyperbola, depending purely on the angle of the cut.15 min readIntersecting Planes (Laminiar Planes)In descriptive geometry, laminar plane problems examine how thin, flat surfaces are oriented, positioned, and intersect in three-dimensional space.11 min readSkew LinesSkew lines are straight lines in three-dimensional space that are neither parallel nor intersecting.10 min readThe Oblique PlaneAn oblique plane is a flat surface inclined to both principal planes of reference: the Horizontal Plane (HP) and the Vertical Plane (VP).16 min readDevelopments & EnvelopmentsTake a cardboard cereal box, cut along its edges, and flatten it out.14 min readInterpenetrationInterpenetration occurs when two 3D solids intersect or join, creating a shared boundary called the line of interpenetration.11 min readSolids in ContactSolids in contact deals with representing three-dimensional geometric bodies that touch tangentially without interpenetrating, and locating their exact…13 min readTetrahedronA tetrahedron is a pyramid with a triangular base.11 min read

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