5 terms with examples.
Study with flashcards| Term / pattern | Meaning / method | Example |
|---|
| Reflection | A fold maps points across a mirror line. | A hole two squares left of a vertical fold appears two squares right after unfolding. |
| Rotation | A turn changes orientation while preserving shape. | A 90-degree clockwise turn maps an upward arrow to the right. |
| Invariant | Track a property that stays fixed while others vary. | Every example may contain exactly two shaded regions despite different outlines. |
| Layer count and coincident holes | Unfolding reflects punched positions through the layers present; coincident reflected positions count once. | A punch away from both creases after two perpendicular folds can yield four holes; a punch on a crease may yield fewer distinct holes. |
| Row rule | A matrix rule must explain all supplied cells. | If a dot shifts right one place per column, verify this in each complete row. |
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