Exercise 16
1 . The following diagram shows a circle with centre O and radius 32.1 cm .
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The points A , B and C are on the circumference of the circle and AOC ˆ � 1.44 rad .
( a ) Find the length of arc ABC .
( b ) Find the perimeter of sector OABC .
( c ) Find the area of sector OABC .
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2 . The following diagram shows a circle with centre O and radius 12 cm .
The points A , B and C are on the circumference of the circle and
AOC ˆ � 2.6 rad .
( a ) Find the length of arc ABC .
( b ) Find the perimeter of sector OABC .
( c ) Find the area of sector OABC .
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