QUESTION IMAGE
Question
pentagon
the sum of the measures of the interior angles of a pentagon is \\(\square^{\circ}\\).
<pre_analysis>
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"concepts_used": [
"Polygon Classification"
],
"new_concepts": [
"Polygon Angle Sum"
],
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"Polygon Angle Sum"
]
}
</pre_analysis>
<reasoning>
Identify the polygon type
Using the Polygon Classification knowledge point
A pentagon is a polygon with \(n = 5\) sides.
Apply the interior angle sum formula
The sum of the interior angles of an \(n\)-sided polygon is given by:
\[
S = (n - 2) \times 180^\circ
\]
Substituting \(n = 5\):
\[
S = (5 - 2) \times 180^\circ = 3 \times 180^\circ = 540^\circ
\]
</reasoning>
<answer>
The sum of the measures of the interior angles of a pentagon is <blank>540</blank>\(^\circ\).
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Geometry",
"Polygon Angle Sum"
]
}
</post_analysis>
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<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"blank_filling_formatter",
"explain_then_answer",
"tutor",
"mastery_adaptive_brevity"
],
"needs_drawing": false,
"concepts_used": [
"Polygon Classification"
],
"new_concepts": [
"Polygon Angle Sum"
],
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"Polygon Angle Sum"
]
}
</pre_analysis>
<reasoning>
Identify the polygon type
Using the Polygon Classification knowledge point
A pentagon is a polygon with \(n = 5\) sides.
Apply the interior angle sum formula
The sum of the interior angles of an \(n\)-sided polygon is given by:
\[
S = (n - 2) \times 180^\circ
\]
Substituting \(n = 5\):
\[
S = (5 - 2) \times 180^\circ = 3 \times 180^\circ = 540^\circ
\]
</reasoning>
<answer>
The sum of the measures of the interior angles of a pentagon is <blank>540</blank>\(^\circ\).
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Fill-in-the-blank",
"knowledge_point": [
"Mathematics",
"Geometry",
"Polygon Angle Sum"
]
}
</post_analysis>