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Concave Convex Mirrors & 3D Forms
A visual primer on how curved mirrors deform images, plus a short companion section on counting edges, vertices and faces of common 3D forms. These two topics together account for a noticeable share of the spatial-reasoning questions in UCeed and NID DAT.
Use it once to build intuition, then revisit a week before the exam for quick refresh.
What's inside
A look at what you'll get
- Concave mirrors: image inversion, magnification and the focal-point trap
- Convex mirrors: the always-shrinking, always-upright rule
- Reading a reflection to infer the mirror type
- Counting edges, vertices and faces of cubes, tetrahedra, prisms and pyramids
- How a 3D form's net unfolds: quick sanity check for net-folding questions