Scale and similar shapes
Solve problems involving similar shapes where the scale factor is known or can be found
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Teaching Table
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“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?”
Full guide and materials
- Activity. Solve problems involving similar shapes where the scale factor is known or can be found
What to notice. 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
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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?
Solve problems involving similar shapes where the scale factor is known or can be found
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Check 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
“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?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Ratio & Proportion
- Age range
- Ages 10–11