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Summaries · Grade 5 Maths › Perimeter
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Perimeter

The distance around a shape, and the formulas for a rectangle and square. Read one part at a time and tap “I know this”. Then test yourself in the quiz.

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Perimeter

5 cm3 cmPerimeter (red edge):5+3+5+3 = 16 cmArea (squares):5 × 3 = 15 cm²
Perimeter = edge; area = inside

Perimeter is the distance around a shape. Add all the sides.

  • Rectangle: P = 2 × (l + b): 2 × (5 + 3) = 16 cm.
  • Square: P = 4 × s.
  • Perimeter units are plain: cm, m.
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Remember this: your summary
  • Perimeter = distance around a shape.
  • Perimeter: add all the sides.
  • Perimeter of a rectangle: 2 × (l + b); of a square: 4 × s.
  • Perimeter units are plain: cm, m.

Write these points in your book. Read them again the night before the test.

Memory trick

PERIMeter: walk around the RIM.

Flash cards · Tap to turn over

Important words

First say the answer yourself, then turn the card over.

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The quiz has many more questions on this topic. Every question shows straight away whether you are right and explains why.

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For parents
  • Let your child work the examples on paper and explain them to you.
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Follows CAPS for Grade 5 Mathematics. Always check your teacher’s notes and textbook too.

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