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8. a rectangle is 8 feet long and 4 feet wide. if we remove a 2 square …

Question

  1. a rectangle is 8 feet long and 4 feet wide. if we remove a 2 square out of one corner of the rectangle, how many square inches would remain in the rectangle?

Explanation:

Response

<pre_analysis>
{
"quality": "clear",
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"needs_drawing": false,
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"new_concepts": [
"Area of Composite Figures"
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"current_concepts": [
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}
</pre_analysis>

<reasoning>

Calculate the remaining area in square feet

\[

$$\begin{aligned} A_{\text{rectangle}} &= 8\text{ ft} \times 4\text{ ft} = 32\text{ sq ft} \\ A_{\text{square}} &= 2\text{ ft} \times 2\text{ ft} = 4\text{ sq ft} \\ A_{\text{remaining, sq ft}} &= 32\text{ sq ft} - 4\text{ sq ft} = 28\text{ sq ft} \end{aligned}$$

\]

Convert the remaining area to square inches

\[

$$\begin{aligned} 1\text{ sq ft} &= 12\text{ in} \times 12\text{ in} = 144\text{ sq in} \\ A_{\text{remaining, sq in}} &= 28 \times 144 = 4032\text{ sq in} \end{aligned}$$

\]
</reasoning>

<answer>
\(4032\text{ square inches}\)
</answer>

<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Geometry",
"Area of Composite Figures"
]
}
</post_analysis>

Answer:

<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"quick"
],
"needs_drawing": false,
"concepts_used": [
"Unit Conversion"
],
"new_concepts": [
"Area of Composite Figures"
],
"current_concepts": [
"Unit Conversion",
"Area of Composite Figures"
]
}
</pre_analysis>

<reasoning>

Calculate the remaining area in square feet

\[

$$\begin{aligned} A_{\text{rectangle}} &= 8\text{ ft} \times 4\text{ ft} = 32\text{ sq ft} \\ A_{\text{square}} &= 2\text{ ft} \times 2\text{ ft} = 4\text{ sq ft} \\ A_{\text{remaining, sq ft}} &= 32\text{ sq ft} - 4\text{ sq ft} = 28\text{ sq ft} \end{aligned}$$

\]

Convert the remaining area to square inches

\[

$$\begin{aligned} 1\text{ sq ft} &= 12\text{ in} \times 12\text{ in} = 144\text{ sq in} \\ A_{\text{remaining, sq in}} &= 28 \times 144 = 4032\text{ sq in} \end{aligned}$$

\]
</reasoning>

<answer>
\(4032\text{ square inches}\)
</answer>

<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Geometry",
"Area of Composite Figures"
]
}
</post_analysis>