Geometry & MeasuresKey Facts
Scale Factor Effects
Part of Transformations: Enlargements — GCSE Mathematics
This key facts covers Scale Factor Effects within Transformations: Enlargements for GCSE Mathematics. Revise Transformations: Enlargements in Geometry & Measures for GCSE Mathematics with 15 exam-style questions and 5 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 2 of 6 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 2 of 6
Practice
15 questions
Recall
5 flashcards
Scale Factor Effects
| Scale Factor | Effect on Shape | Example |
|---|---|---|
| SF > 1 | Shape gets BIGGER | SF = 3: all lengths × 3 |
| SF = 1 | No change (same size) | SF = 1: shape unchanged |
| 0 < SF < 1 | Shape gets SMALLER | SF = 0.5: all lengths × 0.5 |
| SF < 0 | Enlarges AND inverts (opposite side) | SF = -2: twice as big, flipped |