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BAC is a sector of a circle, radius 20 cm, whose centre is at A. Angle BAC = 43º. Calculate the area of the sector BAC
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BAC is a sector of a circle, radius 20 cm, whose centre is at A.

Angle BAC = 43º.
Calculate the area of the sector BAC

User Yassir Irfan
by
8.5k points

1 Answer

5 votes
The area of the circle is pi*r^2 or 400pi.

The sector fills up 43/360 of the circle since there are 360 degrees in a full circle.

Multiply this fraction by the full area to get the area of the sector:

400pi*(43/360)=47.78pi cm^2
User Queens
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