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Opposite pairs

Opposite pairs

Triangle ABC with angles A, B, C and opposite sides BC, AC, AB colour coded to show opposite pairs The sine rule is usually used in non-right-angled triangles and links each angle to the side directly opposite it. Before you substitute anything, identify the matching side-angle pairs.

The Sine Rule Lesson

  1. GCSE
  2. /Maths
  3. /The Sine Rule

Step-by-step lessons covering OCR GCSE Maths The Sine Rule for Foundation and Higher tier. Each lesson works through exam-style questions in the written papers format. Build fluency with number, ratio and algebra first, since geometry, probability and statistics topics rely on them, and leave extra time nearer the exam for Higher-tier problem-solving and multi-step reasoning questions.

Lessons

SurdsBoundsDirect and Inverse ProportionQuadratic FormulaFactorising Harder QuadraticsAlgebraic FractionsRearranging Harder FormulaeInverse and Composite FunctionsIterationFinding the Area of Any TriangleThe Sine RuleThe Cosine RuleCongruent Triangles3d Pythagoras and TrigonometryHistogramsConditional Probability