The radius of a circle is 6 in. Find the area of a sector with an angle of 120°.(1 point)

Responses

A=36π in.2
upper A equals 36 pi in. squared

A=2π in.2
upper A equals 2 pi in. squared

A=9π in.2
upper A equals 9 pi in. squared

A=12π in.2
upper A equals 12 pi in. squared

1 answer

To find the area of a sector of a circle, you can use the formula:

\[ A = \frac{\theta}{360^\circ} \times \pi r^2 \]

where:

  • \( A \) is the area of the sector,
  • \( \theta \) is the angle of the sector in degrees,
  • \( r \) is the radius of the circle.

Given:

  • \( r = 6 \) inches,
  • \( \theta = 120^\circ \).

Now plug in the values:

\[ A = \frac{120}{360} \times \pi \times (6)^2 \]

Calculating \( (6)^2 \):

\[ (6)^2 = 36 \]

Then the equation becomes:

\[ A = \frac{120}{360} \times \pi \times 36 \]

Simplifying \( \frac{120}{360} \):

\[ \frac{120}{360} = \frac{1}{3} \]

Now substituting that back into the equation:

\[ A = \frac{1}{3} \times \pi \times 36 \]

This simplifies to:

\[ A = 12\pi \]

Thus, the area of the sector is:

\[ A = 12\pi \text{ in}^2 \]

So the correct response is:

A=12π in.²

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