The perimeter of a sector of a circle of radius 5.2cm is 16.4 cm find the area of the sector
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the perimeter of a sector invovles the sum of 2radii and an arc.
that means:
2r+length of arc=16.4
10.4+x=16.4
x=6
length of arc=6
perimeter of a cirlcle of given radius is 2pi*r
=»10.4pi
length of arc =(tita/360)*2pi*r=6
tita=6/(2pi*r)*360
now find
area =(tita/360)*pi*r^2
that means:
2r+length of arc=16.4
10.4+x=16.4
x=6
length of arc=6
perimeter of a cirlcle of given radius is 2pi*r
=»10.4pi
length of arc =(tita/360)*2pi*r=6
tita=6/(2pi*r)*360
now find
area =(tita/360)*pi*r^2
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