Perimeter (Year 3)
Calculate the perimeter of 2D shapes by adding side lengths.
The questions below are generated to match the National Curriculum for Year 3 and get harder as you progress from Rookie to Guru.
Worked examples
RookieRead and interpret directly.
How many minutes in an hour?
- 60
- 100
- 30
- 24
Answer: 60. 1 hr = 60 min.
ProCompare and infer.
Read scale: 10 ticks 0-100. Pointer at 5th tick. Value?
- 50
- 5
- 10
- 25
Answer: 50. 5 × 10 = 50.
GuruMulti-step reasoning.
A jug holds 1 litre. Sara fills 4 cups, each 200 ml. Can she fill 5?
- No - 5 needs 1,000 ml = exactly 1 l, OK so YES.
- Yes always
- No - too much
- Cannot tell
Answer: No - 5 needs 1,000 ml = exactly 1 l, OK so YES.. 5 × 200 = 1,000 = jug.
Related skills
Frequently asked questions
- What is perimeter?
- Calculate the perimeter of 2D shapes by adding side lengths.
- How can my child practise perimeter at home?
- Work through the examples below, then start a free adaptive session. Northstar adjusts the difficulty automatically and tracks mastery over time.
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