Similarity & Scale Factors
Similar figures preserve shape and corresponding angles while every corresponding length scales by one factor; areas therefore scale by the square of that factor.
What you'll learn
- Identify a common scale factor across corresponding lengths.
- Match corresponding sides by position and angle structure rather than arbitrary size order.
- Distinguish similarity from congruence.
- Explain why perimeter scales by k and area by k².
- Use area ratios inside nested similar figures.
Before you start
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