find the arc length, area and perimeter of a sector with radius 21cm and centre angle 60
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given
radius of the sector =r =21cm
angle =x=60
1)length of the arc l= x/360* 2*pi*r
= 60/360* 2* 22/7* 21
=22 cm
2) area of the sector = A = x/ 360* pi* r^2
= 60/360* 22/7* 21*21
= 231 square cm
radius of the sector =r =21cm
angle =x=60
1)length of the arc l= x/360* 2*pi*r
= 60/360* 2* 22/7* 21
=22 cm
2) area of the sector = A = x/ 360* pi* r^2
= 60/360* 22/7* 21*21
= 231 square cm
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