Context for question 7The diagram shows a sector ACD of a circle with centre C and radius 2r. The midpoint of AC is B. The length of BD is r7.
7(a)Radians Circular MeasureMedium4 marksFind the exact perimeter of the shaded region. Give your answer in terms of π and r.WorkingTypeWriteMath0 wordsGrade answerSolutionGrading criteria
7(b)Radians Circular MeasureMedium4 marksFind the exact area of the shaded region. Give your answer in terms of π and r.WorkingTypeWriteMath0 wordsGrade answerSolutionGrading criteria