A sector with angle A is subtended to the centre point of a circle. Area of the sector is proportional to
- angle A.
- cos A.
- sin A.
Explanation from PART66Online
The area of a sector is a fraction of the whole circle's area equal to its central angle over 360 degrees, so the area grows in direct proportion to the angle A. The trigonometric ratios cos A and sin A do not vary linearly with the angle and so cannot be the proportionality.
M
Marlon88 asked · 24 Dec 2012
Explain
Community Comments (2)
T
trap2307
7 Jan 2013
Area of a sector is proportional to the subtended angle of the sector.
P
PART66Online
8 Jan 2013
Formula for calculating area of sector is S = (A/360) * pi *r^2, so if angle A will increase, area also will increase proportionally.
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