9709 P12 - Jun 2024 - Q8 - 10 marks
10108
A, B, C and D lie on a straight line and BC=2 cm. The sectors ABF and DCE each have radius r cm and angle π/3 radians.
(a)(i) For r=0.4, show that EF=2.4 cm. [2]
(a)(ii) For r=0.4, find the plate area to 3 significant figures. [4]
(b) Instead, the perimeter is 6 cm. Find r to 3 significant figures. [4]
