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Asked by Kadar Last Modified
Answer 
Abhay
Total length of wire required will be the length of 5 diameters and the circumference of the brooch.
Radius of circle =
Circumference of brooch = 2πr
= 110 mm
Length of wire required = 110 + 5 × 35
= 110 + 175 = 285 mm
It can be observed from the figure that each of 10 sectors of the circle is subtending 36° at the centre of the circle.
Therefore, area of each sector =
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