Total length of wire required will be the length of 5 diameters and the circumference of the brooch.
Radius of circle = 35/2 mm
Circumference of brooch = 2πr
=2 x 22/7 x 35/2
=110 mm
Length of wire required = 1100+5 x 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 =