Estimating answers (age 9+)
Apply the area formula (l × w) and perimeter formula (2l + 2w) for rectangles including squares in real-world and mathematical problems; calculate and compare areas using standard units (cm², m²) and estimate areas of irregular shapes
Typical age: 9–10 years
“If your child wants to carpet a room 6.5 m × 4 m, can they calculate the area — and also work out how many metres of skirting board are needed around the edge?”
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- Scale and similar shapes
Scale factor problems often involve computing scaled lengths/perimeters/areas
- Real-World Maths Modelling
Area/perimeter formula problems exercise real-world modelling
- Area with FractionsREQUIRED
Must know area = l × w before extending to fractional side lengths
- Understanding angles (age 9+)
Rectangle area/perimeter formulas support finding missing lengths
- Perimeter (age 10+)REQUIRED
Exploring area/perimeter relationship requires area and perimeter formula knowledge
- Area of Triangles & ParallelogramsREQUIRED
Triangle/parallelogram area extends rectangle area formula
- Angles in triangles (age 11+)REQUIRED
Area formulae build on KS2 rectangle area/perimeter