11. Exercise problems IX

A brooch is made with silver wire in the form of a circle with a diameter of \(35 mm\). The wire is also used in making \(5\) diameters which divide the circle into \(10\) equal sectors as shown in Fig. Find:

 

 

 

(i) The total length of the silver wire required.

 

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(ii) The area of each sector of the brooch.

 

Ans: