Q.5. What is the perimeter and area of the alongside figure? 7.5 m 2.5 m 2.5 m 25 m
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Answer:
Let OAB be the given sector.
⇒ And arc AB=1
Perimeter of sector OAB = OA + OB + arc AB
• 27.2 = 5.7 + 5.7 + 1
∴ 1 = 27.2 − 11.4 = 15.8cm
• Now, Area of sector OAB = 1/2 × 1 × r
• Area of sector OAB = 1/2 × 15.8 × 5.7
• Area of sector OAB = 45.03 , cm 2 ki power
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