Three parts of a circle with a radius of 14 cm is shaded. These three parts add up to a quarter of the circle. What is the total perimeter of the three shaded parts? Take

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Worked solution
14
1. Calculate the total arc length of the three shaded parts
The three parts add up to a quarter of the circle. Therefore, their combined arc length is a quarter of the circumference of the circle.
2. Calculate the total length of the straight edges of the three shaded parts
Each shaded part is a sector, which has 2 straight edges, each equal to the radius ( cm). Since there are 3 separate shaded parts, there are straight edges in total.
3. Calculate the total perimeter of the three shaded parts
Answer
cm (option 4)
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