Use the image to answer the question.

a triangle upper A upper B upper C; The edge upper A upper B is labeled c. The edge upper A upper C is labeled b. The edge upper B upper C is labeled a.

If the area of △ABC=134
square feet, m∠C = 41°
, and b=24
feet, then what is the length of side a
? Round your answer to the nearest whole number.

(1 point)
Responses

15 feet
15 feet

9 feet
9 feet

16 feet
16 feet

17 feet

1 answer

To find the length of side \(a\) in triangle \(ABC\) given the area and the lengths of side \(b\) and the angle \(C\), we can use the formula for the area of a triangle:

\[ \text{Area} = \frac{1}{2} \cdot b \cdot a \cdot \sin(C) \]

We know:

  • The area of the triangle \(\text{Area} = 134\) square feet,
  • \(b = 24\) feet,
  • \(C = 41^\circ\).

Substituting the known values into the formula gives:

\[ 134 = \frac{1}{2} \cdot 24 \cdot a \cdot \sin(41^\circ) \]

Now, we can solve for \(a\):

  1. First, calculate \(\sin(41^\circ)\):

\[ \sin(41^\circ) \approx 0.6561 \]

  1. Substitute this value into the equation:

\[ 134 = \frac{1}{2} \cdot 24 \cdot a \cdot 0.6561 \]

  1. Simplify:

\[ 134 = 12 \cdot a \cdot 0.6561 \]

  1. Further simplification:

\[ 134 = 7.8732 \cdot a \]

  1. Now, solve for \(a\):

\[ a = \frac{134}{7.8732} \approx 17.0 \]

Rounding \(17.0\) to the nearest whole number gives:

\[ a \approx 17 \text{ feet} \]

Thus, the length of side \(a\) is 17 feet.

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