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To obtain the area of a sector, what fraction is multiplied by the area of a circle (A = πr2)?
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Sep 4, 2019
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To obtain the area of a sector, what fraction is multiplied by the area of a circle (A = πr2)?
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Bhau
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Bhau
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Let r be a radius of a given circle and α be an angle, that corresponds to a sector.
The circle area is
and denote the sector area as
.
Then
(the ratio between area is the same as the ratio between coresponding angles).
.
IChido
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Sep 10, 2019
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IChido
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