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Exam-style practice

Non-right-angled triangles answer explanations

Review worked answers and explanations for Non-right-angled triangles. Aligned to Cambridge IGCSE Mathematics.

Answer explanations

Question 1 of 2

Review the answer support, then move sideways through the set.

Paper 2 structured question: Non-right-angled triangles

Paper 2Core or Extended Mathematics6 marks

Diagram Description

Triangle ABC

Triangle ABC has sides AB = 7 cm, AC = 10 cm, and angle BAC = 120°. Find the length of side BC and the area of the triangle.

Side/AngleValue
AB7 cm
AC10 cm
Angle BAC120°
  1. a

    Calculate the length of side BC.

    [3]
  2. b

    Calculate the area of triangle ABC.

    [3]