Worked Example

Part of Perimeter · Section 4 of 5

Study NotesUnit: Geometry & MeasuresGCSE

This study notes covers Worked Example within Perimeter for GCSE Mathematics. Revise Perimeter in Geometry & Measures for GCSE Mathematics with 10 exam-style questions and 2 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 4 of 5 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.

Worked Example

Find the perimeter of a rectangle with length 8cm and width 5cm.

Solution

P = 2(l + w) = 2(8 + 5) = 2 × 13 = 26 cm

Practice questions for Perimeter

What is the perimeter of a shape?

  • A. The space inside a shape
  • B. The total distance around the outside of a shape
  • C. Half the sum of all sides
  • D. The longest side of a shape
1 markfoundation

Two similar rectangles have lengths in the ratio 3:5. The perimeter of the smaller rectangle is 24 cm. Explain how to find the perimeter of the larger rectangle without knowing its individual dimensions.

2 markshigher

Quick recall flashcards

Perimeter vs Area
Perimeter = distance AROUND (1D - cm, m). Area = space INSIDE (2D - cm², m²).
Perimeter
Total distance around a shape, add all sides

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Method: Finding Perimeter

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Knowledge Organiser: Perimeter

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