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Primary 5 Maths: Triangle, Parallelogram and Trapezium Area — Practice Paper 4 (10 Questions)
Primary 5 Maths: Triangle, Parallelogram and Trapezium Area — Practice Paper 4 (10 Questions)
Paper 4 is about joining and taking away: an L-shape is a rectangle minus a corner, two trapeziums turn into a parallelogram, and an overlap is subtracted once.
Quick answer 10 questions, about 25 minutes. Item 05 is the L-shape, item 07 the unit change, item 08 the joined trapeziums and item 09 the overlap; mark after finishing.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 questions |
| Suggested time | 25 minutes |
| Difficulty mix | Foundation 4 · Intermediate 3 · Challenge 2 · Error redo 1 |
| Chapter | Chapter: Primary 5 Maths: Areas of Triangles, Parallelograms and Trapeziums |
| Level | Primary 5 |
02 Questions (10 items)
- FoundationA triangle has base 16 cm and height 9 cm. Find its area.
- FoundationA parallelogram has base 2.5 m and height 1.6 m. Find its area.
- FoundationA trapezium has parallel sides 11 cm and 19 cm and height 6 cm. Find its area.
- FoundationA parallelogram has area 112 cm² and height 7 cm. Find its base.
- IntermediateAn L-shape is an 18 cm by 10 cm rectangle with a 6 cm by 4 cm rectangle cut from one corner. Find its area.
- IntermediateA triangle has area 54 m² and height 9 m. Find its base.
- IntermediateA table top is 2 m long and 1.5 m wide. Find its area in cm².
- ChallengeTwo identical trapeziums (parallel sides 4 cm and 8 cm, height 5 cm) are joined into one parallelogram. Give its base and height, and the area of one trapezium.
- ChallengeTwo 8 cm by 6 cm rectangles overlap on a 4 cm by 6 cm region. What area do they cover altogether?
- Error redoA square has 9 cm edges. Give its area and its perimeter. (common slip: writing the area as 36)
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 72 cm² | Base × height ÷ 2 = 16 × 9 ÷ 2. |
| 2 | 4 m² | No halving for a parallelogram: 2.5 × 1.6, keeping the decimal places. |
| 3 | 90 cm² | (11 + 19) × 6 ÷ 2; add the parallel sides first. |
| 4 | 16 cm | No halving here, so base = area ÷ height = 112 ÷ 7. |
| 5 | 156 cm² | The whole is 180 cm²; subtract the small 24 cm² rather than splitting into two parts. |
| 6 | 12 m | Reverse the formula: base = area × 2 ÷ height = 108 ÷ 9. |
| 7 | 30000 cm² | That is 3 m² first; 1 m² = 10,000 cm², so multiply by 10,000, not 100. |
| 8 | Base 12 cm, height 5 cm; each trapezium is 30 cm² | Turn one copy round and join the slant sides: the base is 4 + 8 = 12. The parallelogram is 60 cm², so one trapezium is half of it. |
| 9 | 72 cm² | Adding 48 and 48 counts the overlap twice, so subtract 24 once. |
| 10 | Area 81 cm², perimeter 36 cm | Area is 9 × 9; perimeter is four edges, 9 × 4. Different numbers and different units. |
04 What to do after marking
- After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
- Repeat the same item two days later; move to the next paper only when both attempts are correct.
- Parents only need the answer and note columns; there is no need to explain every item.
Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.
