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Question 5
Calculate the perimeter of the sector
4cm
285
Circumference of circle of radius 4 cm = 8π cm length of 285° arc = (285/360)×(circumference) = (19/24) × 8π = (19/3)π Perimeter of sector = arc length + 2 radii = (19/3)π + 8 ≈ 27.9 cm
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