Area of compound shapes
Recognise area as additive; find areas of rectilinear figures by decomposing into non-overlapping rectangles and summing their areas
Teaching approaches
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1 approach
If your child is given an L-shaped room on squared paper, can they split it into two rectangles, find the area of each part, and add them to get the total area?
Recognise area as additive; find areas of rectilinear figures by decomposing into non-overlapping rectangles and summing their areas
Learning resources
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This concept
Check understanding
- Decompose an L-shape into two rectangles, find each area, and add them
- Find the area of a floor plan shaped like a T by splitting into rectangles
- Solve: A room is L-shaped (3m×5m plus 2m×4m) — what is the total area?
“If your child is given an L-shaped room on squared paper, can they split it into two rectangles, find the area of each part, and add them to get the total area?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Measurement
- Age range
- Ages 8–9