Mathematics·Ratio & Proportion·procedural
Scale and similar shapes
Solve problems involving similar shapes where the scale factor is known or can be found
Suggested ages 10–11
Learning journey
Your child is learning to compare quantities and solve problems involving ratios, proportions, percentages, and scale — essential skills for understanding relationships between numbers in real-world contexts.
Evidence of understanding
- Find the missing side of a similar rectangle given a scale factor of 3
- Determine the scale factor between two similar triangles from given side lengths
- Use a scale factor to enlarge or reduce a shape and verify that all sides are in the same ratio
Assessment prompt
If Scale and similar shapes 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?
Standards alignment
No external standards are linked to this topic.