A brooch is made with silver wire in the form of a
circle with diameter 35 mm. The wire is also used in
making 5 diameters which divide the circle into 10
equal sectors . Find:
(i) the total length of the silver wire required.
(ii) the area of each sector of the brooch.
Answers
Answered by
6
ANSWER
Diameter =35mm
∴ Circumference of circle
=2×π×r =2×π×17.5=110mm
i) The total length of the silver wire required
= Circumference of circle + (5×35)
=110+175 = 285mm
(ii) The area of each sector of the brooch
=
10
Area of circle
=
10
π×17.5×17.5
=
4
385
mm
2
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4
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