The diagram shows a sector of a circle with centre $$\(O\)$$, radius $$\(8 \mathrm{~cm}\)$$ and sector angle $$\(165^{\circ}\)$$. A cone is made from the sector by joining $$\(O A\)$$ to $$\(O B\)$$. Calculate the radius, $$\(r\)$$, of the cone. $$\[ r=...................cm \]$$
Exam No：0580_s20_qp_41 Year：2020 Question No：9(c)(i)
Answer:
\(3.67\) or \(3.666\) to \(3.667\)
Knowledge points:
E5.3.1 Carry out calculations involving the circumference and area of a circle. (Answers may be asked for in multiples of π.)
E5.3.2 Solve problems involving the arc length and sector area as fractions of the circumference and area of a circle.
Solution:
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