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From the measures given below, find the area of the sectors.S. Nolength of the arc (l)radius(r)(i)48 m10 m(ii)12.5 cm6 cm(iii)50 cm13.5 cm |
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Answer» (i) Area of the sector A = lr/2 sq. units l = 48 m r = 10 m = (48 × 10)/2 m2 = 24 × 10 m2 = 240 m2 Area of the sector = 240 m2 (ii) length of the arc l = 12.5 cm Radius r = 6 cm Area of the sector A = lr/2 sq. units = (12.5×6)/2 = 12.5 × 3 cm2 = 37.5 cm2 Area of the sector = 37.5 cm2 (iii) length of the arc l = 50 cm Radius r = 13.5 cm Area of the sector A = lr/2 sq. units = (50×13.5)/2 = 25 × 13.5 cm2 = 337.5 cm2 Area of the sector = 337.5 cm2 |
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