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31-01-2021
Mathematics

contestada

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

Respuesta :

reguser315 reguser315

31-01-2021

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

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