Cambridge IGCSE Mathematics
6.5Non-right-angled triangles
Non-right-angled triangles in Cambridge IGCSE Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic21 practice questions1 lesson
Learning objectives
What the syllabus expects you to be able to do.
- 6.5.1Extended: use the sine rule and the cosine rule to find lengths and angles in any triangle, including obtuse angles and the ambiguous case.
- 6.5.2Extended: use the formula area = ½ab sin C.
Lessons
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Sine and cosine rules
30 min
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Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
Turn Non-right-angled triangles into a strength.
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