Surface area of composite objects

Find the surface area of objects built from prisms and cylinders by deciding which faces are exposed and which are hidden.

⏱ 20 min❓ 9 questions

What you'll be able to do

✔I can break a composite object into prisms and cylinders and list its exposed faces
✔I can decide which areas are hidden where two solids join and adjust the total correctly
✔I can calculate the surface area of composite and hollow objects in practical contexts

How this works

1Read the short explanations first — they teach you what you need before each question.
2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

9 questions and 1 quick teaching card, including:

🔘Multiple choice — Tap the answer you think is best, then check it.
🔢Number answer — Work out the answer and type the number.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

Curriculum: AC9M10M01