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secondary 3 | E Maths
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Date Posted: 4 years ago
Views: 396
Find angle AOB by working backwards, using the formula for arc length :
arc length = angle subtended by the two lines at each end of the arc that meet at the centre of the circle ÷ 360° x circumference of the circle
Next, find OC using trigo, since the triangle AOC is right angled.
Then find area of triangle AOC using formula ½ab sin c
Find area of the sector, and subtract area of the triangle AOC from it to get your answer.
arc length = angle subtended by the two lines at each end of the arc that meet at the centre of the circle ÷ 360° x circumference of the circle
Next, find OC using trigo, since the triangle AOC is right angled.
Then find area of triangle AOC using formula ½ab sin c
Find area of the sector, and subtract area of the triangle AOC from it to get your answer.
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Part 1
Date Posted:
4 years ago
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Part 2
Date Posted:
4 years ago
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part 1 of answer
Date Posted:
4 years ago
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part 2 of answer. i have included some drawing and explanation to help you understand the solution.
hope it helps!
hope it helps!
Date Posted:
4 years ago
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