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Question

If the radius of the circle is 6 cm and the length of an arc is 12 cm . Find the area of the sector.

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Solution

Given the radius of Circle 6 cm

The length of arc is given by x360×2πr

where x is angle subtended by an arc at the center of the circle

The length is 12

so
x360×2×227×6=12x360×227=1(1)

The area of sector is given by
x360×πr2x360×227×6×6

From (1)

1×6×6=36

So the area of sector is 36 cm2

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