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Learning objective

Determine the lengths of shapes that are similar to one another.

Read the explanation, check the common trap, then practise with flashcards and questions.

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Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE MathematicsCore Geometry

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Quick explanation

Determine the lengths of shapes that are similar to one another

  • This point belongs to Similarity, especially Similarity outcomes.
  • You need to be able to determine the lengths of shapes that are similar to one another.
  • The key ideas to know are Calculate, Determine, and Show.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

CalculateDetermineShow

Why it matters

This objective helps connect Similarity outcomes to exam-style questions, flashcards, and revision notes for Similarity.

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Paper 2 structured question: Similarity

Paper 2Core or Extended Mathematics3 marks

Description

Similar Triangles

Triangle A has sides of 5 cm, 12 cm, and 13 cm. Triangle B is similar to triangle A and has a side of 10 cm corresponding to the 5 cm side of triangle A.

  1. a

    Calculate the lengths of the other two sides of triangle B.

    Aim for approximately 3 distinct marking points.

    [3]
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