the area of a sector is 924 sq.cm and radius is 42 cm then the perimeter of the sector is.?
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Area = 1/2 r² * Ф
∴ Ф = 2*Area/r² = 1848/42*42 = 1.048rads.
∴ Perimeter = S + 2r = rФ + 2r = 1.048*42 + 2*42
= 128cm
∴ Ф = 2*Area/r² = 1848/42*42 = 1.048rads.
∴ Perimeter = S + 2r = rФ + 2r = 1.048*42 + 2*42
= 128cm
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