Thread: Area of a Sector

Those lines in the circle are both radius'. The radius is 3. I'm supposed to find the area of the sector. How do I solve this?

Is the answer:

a.

b.

c.

d.

The area of the sector is given by:

A = (pi*r²) x (θ/360)

r is the radius

θ is the angle of the sector you are trying to find the area of (in your case, it would be 90 degrees)

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A = (pi*9) x (90/360)
A = (pi*9) x (1/4)
A = 9pi / 4