Follow one thing on paper: what you see, where it goes after a turn or a flip, where a face lands when folded. Don't turn the whole shape in your head.
Spatial Reasoning: Rotational Symmetry
Methods in this video
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- 1
A half turn swaps both pairs
When to use it: A turn of 180°, something turned upside down, a question about rotational symmetry, or a half turn followed by a flip.
- A half turn is left-right swapped and top-bottom swapped.
- Every position's partner is straight across the centre.
- On a grid: read the first row backwards and it must match the last row.
- Numbers upside down: the order reverses and each digit turns over too.
Practise exam-style questions with these methods
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