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Cambridge AS & A Level Mathematics

1.4Circular measure

Circular measure in Cambridge AS & A Level Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Topic20 practice questions1 lesson

Learning objectives

What the syllabus expects you to be able to do.

  1. 1.4.1Understand the radian and convert between radians and degrees.
  2. 1.4.2Use s = rθ and A = ½r²θ to solve problems on arc length and sector area.

Lessons

  • Radians, arcs, sectors and segments

    45 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Circular measure: sample question

1 mark

Convert 40∘40^\circ to radians, correct to 3 significant figures.

Answer in rad.

Turn Circular measure into a strength.

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