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29 in \\(\\delta clm\\) below, \\(m\\angle c = 33^{\\circ}\\), \\(cl = …

Question

29 in \\(\delta clm\\) below, \\(m\angle c = 33^{\circ}\\), \\(cl = 8\\), and \\(cm = 15\\).

determine and state, to the nearest tenth, the area of \\(\delta clm\\).

Explanation:

Response

<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [],
"new_concepts": [
"Trigonometric Area Formula"
],
"current_concepts": [
"Trigonometric Area Formula",
"Triangle Area"
]
}
</pre_analysis>

<reasoning>

State the given values and formula

\[

$$\begin{aligned} &a = CL = 8\\ &b = CM = 15\\ &C = 33^\circ\\ &\text{Area} = \frac{1}{2} a b \sin(C) \end{aligned}$$

\]

Calculate the area

\[

$$\begin{aligned} &\text{Area} = \frac{1}{2} \cdot 8 \cdot 15 \cdot \sin(33^\circ)\\ &\text{Area} = 60 \cdot \sin(33^\circ)\\ &\sin(33^\circ) \approx 0.544639\\ &\text{Area} \approx 60 \cdot 0.544639 = 32.678 \end{aligned}$$

\]

Round to the nearest tenth

\[
\text{Area} \approx 32.7
\]
</reasoning>

<answer>
32.7
</answer>

<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Geometry",
"Trigonometric Area Formula"
]
}
</post_analysis>

Answer:

<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [],
"new_concepts": [
"Trigonometric Area Formula"
],
"current_concepts": [
"Trigonometric Area Formula",
"Triangle Area"
]
}
</pre_analysis>

<reasoning>

State the given values and formula

\[

$$\begin{aligned} &a = CL = 8\\ &b = CM = 15\\ &C = 33^\circ\\ &\text{Area} = \frac{1}{2} a b \sin(C) \end{aligned}$$

\]

Calculate the area

\[

$$\begin{aligned} &\text{Area} = \frac{1}{2} \cdot 8 \cdot 15 \cdot \sin(33^\circ)\\ &\text{Area} = 60 \cdot \sin(33^\circ)\\ &\sin(33^\circ) \approx 0.544639\\ &\text{Area} \approx 60 \cdot 0.544639 = 32.678 \end{aligned}$$

\]

Round to the nearest tenth

\[
\text{Area} \approx 32.7
\]
</reasoning>

<answer>
32.7
</answer>

<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Geometry",
"Trigonometric Area Formula"
]
}
</post_analysis>