ZIMSEC · A Level
Technical Graphics and Design
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Form 5 · Lower 6 4 topics
- Plane geometry: conics, loci and mechanisms Curves formed by cutting a cone with a plane: circle, ellipse, parabola and hyperbola.
- Solid geometry: projections, true lengths and true shapes First and third angle projection; principal views; hidden detail; projection symbols.
- Interpenetration of solids and developments The line of intersection where two solids meet (e.g. a cylinder joining a cone, two cylinders at an angle, a prism through a pyramid). Methods:
- Engineering drawing standards, tolerances and fits Drawing practice follows ISO (and SAZ-adopted) standards for lines, lettering, dimensioning, sections, conventions and title blocks.