Surface area of prisms builds confident Year 8 mathematical reasoning. Work from the information given, choose a suitable method, show each step and check that the answer is sensible.
Example
A worked surface area of prisms example should show the method clearly before giving a final answer.
Key terms
Method:
A planned set of mathematical steps.
Reasoning:
Explaining why a method is suitable.
Check:
Testing whether an answer is sensible.
Questions
1. Surface area of prisms: check 1 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
2. Surface area of prisms: check 2 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
3. Surface area of prisms: check 3 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
4. Surface area of prisms: check 4 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
5. Surface area of prisms: check 5 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
6. Surface area of prisms: check 6 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
7. Surface area of prisms: check 7 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
8. Surface area of prisms: check 8 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
9. Surface area of prisms: check 9 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
10. Surface area of prisms: check 10 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
11. Surface area of prisms: check 11 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
12. Surface area of prisms: check 12 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
13. Surface area of prisms: check 13 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
14. Surface area of prisms: check 14 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
15. Surface area of prisms: check 15 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
16. Surface area of prisms: check 16 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
17. Surface area of prisms: check 17 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
18. Surface area of prisms: check 18 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
19. Surface area of prisms: check 19 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
20. Surface area of prisms: check 20 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
21. Surface area of prisms: check 21 — which approach shows clear mathematical reasoning?
Identify the information, choose a method, calculate carefully and check the result
Guess an answer without working
Ignore units and conditions
Use an unrelated rule
Answer key (parent copy)
1. Identify the information, choose a method, calculate carefully and check the result
2. Identify the information, choose a method, calculate carefully and check the result
3. Identify the information, choose a method, calculate carefully and check the result
4. Identify the information, choose a method, calculate carefully and check the result
5. Identify the information, choose a method, calculate carefully and check the result
6. Identify the information, choose a method, calculate carefully and check the result
7. Identify the information, choose a method, calculate carefully and check the result
8. Identify the information, choose a method, calculate carefully and check the result
9. Identify the information, choose a method, calculate carefully and check the result
10. Identify the information, choose a method, calculate carefully and check the result
11. Identify the information, choose a method, calculate carefully and check the result
12. Identify the information, choose a method, calculate carefully and check the result
13. Identify the information, choose a method, calculate carefully and check the result
14. Identify the information, choose a method, calculate carefully and check the result
15. Identify the information, choose a method, calculate carefully and check the result
16. Identify the information, choose a method, calculate carefully and check the result
17. Identify the information, choose a method, calculate carefully and check the result
18. Identify the information, choose a method, calculate carefully and check the result
19. Identify the information, choose a method, calculate carefully and check the result
20. Identify the information, choose a method, calculate carefully and check the result
21. Identify the information, choose a method, calculate carefully and check the result