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Question 4 Diagram below shows a circle with radius of 4 cm and a sector OBC with centre O Rajah di bawah menunjukkan sebuah bulatan

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Question 4 Diagram below shows a circle with radius of 4 cm and a sector OBC with centre O Rajah di bawah menunjukkan sebuah bulatan berjejari 4 cm dan sector OBC berpusat O. B A 4 cm O 12 cm D C Given that the length of arc BC is 12 cm and OA : OB = 2 :3. Diberi bahawa panjang lengkok BC ialah 12 cm dan OA : OB = 2 : 3 Use / Guna It = 3.142 Find Cari (a) the value of 0, in radian, [2 marks] nilai 0, dalam radian, [2 markah] (b) the perimeter of the whole diagram, [4 marks ] perimeter keseluruhan rajah tersebut, [4 markah] (c) the area of the whole diagram. [4 marks] luas keseluruhan rajah tersebut. [4 markah]

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