Which faces end up opposite when a net folds? Two structural rules — touching squares can't be opposite, strip-of-three ends must be — answer most cube questions without folding anything.
Neighbours in the net become neighbouring faces — never opposites.
In any straight line of three squares, the two ends face each other on the cube (C and D here).
B front → A top, E bottom, C left, D right, F back. Three opposite pairs: A/E, C/D, B/F.
Using the net above: which face is opposite C, and can A and B be opposite?
Not distance — structure! F looks far from B but IS its opposite; A looks far from E and IS its opposite. Use the skip-one rule, not eyesight.
Patterns turn! When a face folds round, its pattern rotates with it — an arrow pointing up in the net may point sideways on the cube.
One base first! Fix the centre square as the front, fold neighbours one at a time. Whole-net folding overloads working memory.
Use the skip-one rule: in any straight line of three squares, the two ends fold to opposite faces. And touching squares can never be opposite.
Any option showing two squares that touch in the net sitting on opposite faces — impossible, cross it off.
Because patterns rotate as faces fold round — an arrow's direction on the cube usually differs from its direction in the flat net.
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