IP EMaths Notes (Upper Sec, Year 3-4): 11) Mensuration and 3D Geometry
In one line
Surface area, volume, and composite shape strategies with consistent unit handling.
Last updated 30 Nov 2025
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- Start Here
- Formula essentials
- Worked example - Composite solid volume
- Worked example - Surface area of an open cylinder
Q: What does IP EMaths Notes (Upper Sec, Year 3-4): 11) Mensuration and 3D Geometry cover?
A: Surface area, volume, and composite shape strategies with consistent unit handling.
Start Here
| Read time | What to take away |
| 1 second | Draw the solid, label every length, and keep area and volume units separate. |
| 10 seconds | Surface area counts exposed faces; volume counts space filled. For composite solids, split the shape into familiar parts, calculate each part, then add or subtract. |
| 100 seconds | Use the cylinder, hemisphere, tank, and cuboid examples to practise formula selection, unit handling, and whether the question asks for metal area, capacity, or a hidden diagonal. |
Build a formula bank for quick recall and keep units consistent. Draw nets for surface-area questions and label every edge before calculating.
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These notes align with SEAB GCE O-Level Mathematics (4052) content used in IP programmes (exams from 2026).
Status: SEAB O-Level Mathematics 4052 syllabus (exams from 2026) checked 2025-11-30 - scope unchanged; remains the reference for these notes.
Formula essentials
- Area of circle:
