In circle K with m, angle, J, K, L, equals, 46, degreesm∠JKL=46 ∘ and J, K, equals, 11JK=11, find the area of sector JKL. Round to the nearest hundredth.

1 answer

To find the area of sector JKL in circle K, we can use the formula for the area of a sector, which is given by:

\[ \text{Area} = \frac{\theta}{360} \times \pi r^2 \]

where \(\theta\) is the angle of the sector in degrees and \(r\) is the radius of the circle.

In this problem, we have:

  • \(m \angle JKL = 46^\circ\)
  • The length \(JK = 11\), which acts as the radius \(r\) of the circle since all radii in a circle measure the same.

Now, substituting the known values into the formula:

  1. Identify \(\theta\) and \(r\):

    • \(\theta = 46^\circ\)
    • \(r = 11\)
  2. Plugging in the values:

\[ \text{Area} = \frac{46}{360} \times \pi \times 11^2 \]

  1. Calculate \(11^2\):

\[ 11^2 = 121 \]

  1. Substitute back into the area equation:

\[ \text{Area} = \frac{46}{360} \times \pi \times 121 \]

  1. Calculate \(\frac{46}{360}\):

\[ \frac{46}{360} = \frac{23}{180} \approx 0.12777778 \]

  1. Then equation now looks like this:

\[ \text{Area} \approx 0.12777778 \times \pi \times 121 \]

  1. Now compute the multiplication:

\[ \text{Area} \approx 0.12777778 \times 3.14159 \times 121 \]

\[ \text{Area} \approx 0.12777778 \times 380.1321 \approx 48.63785 \]

  1. Finally, rounding to the nearest hundredth:

\[ \text{Area} \approx 48.64 \]

Thus, the area of sector JKL is approximately 48.64 square units.