0580/23 Oct/Nov 2025, Question 4: Composite Perimeter, Area and Volume
Cambridge IGCSE Mathematics 0580 · Paper 23 (Extended) · Non-calculator · 2 marks
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The question, in short
Two 5 cm by 19 cm rectangles are joined as shown in the T-shaped diagram; work out the perimeter of the resulting shape.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 2 marks
- 1Each rectangle has perimeter 2 × (19 + 5) = 48 cm.
- 2Where they join, 5 cm of each rectangle is hidden: 10 cm in total.
- 3Perimeter = 48 + 48 − 10 = 86 cm
Answer86
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