🔢 Mathematics · Ratio & Proportion
Scale and similar shapes
Solve problems involving similar shapes where the scale factor is known or can be found
Typical age: 10–11 years
“If your child has a scale drawing where 1 cm represents 5 m, and a room measures 3.5 cm on the plan, can they work out the real length of the room?”
0 / 3 mastered
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Needs first
- Estimating answers (age 9+)
Scale factor problems often involve computing scaled lengths/perimeters/areas
- Bar Models for Ratios
Scale factor problems for similar shapes can be represented as ratio bar models
- Percentages (age 9+)REQUIRED
Similar shapes and scale requires 'scale', 'equivalent', and 'proportion' as defined terms
- Ratio ProblemsREQUIRED
Scale factor problems are a specific application of ratio/proportion
- Classifying shapes by propertiesREQUIRED
Similarity requires understanding shape properties — equal angles, proportional sides