Perimeter (Year 5)
Calculate the perimeter of 2D shapes by adding side lengths.
The questions below are generated to match the National Curriculum for Year 5 and get harder as you progress from Rookie to Guru.
Worked examples
RookieRead and interpret directly.
Which is a RIGHT angle?
- 90°
- 180°
- 120°
- 45°
Answer: 90°. Right = 90°.
ProCompare and infer.
Which has MORE lines of symmetry: square or equilateral triangle?
- Square (4 vs 3)
- Triangle
- Equal
- Cannot tell
Answer: Square (4 vs 3). Square 4; triangle 3.
GuruMulti-step reasoning.
Why is a square classed as both a rectangle AND a rhombus?
- Square has all properties of a rectangle (right angles) AND of a rhombus (4 equal sides) — it's the intersection.
- Coincidence.
- Convention.
- Vague.
Answer: Square has all properties of a rectangle (right angles) AND of a rhombus (4 equal sides) — it's the intersection.. Square = rectangle ∩ rhombus.
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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