QUESTION IMAGE
Question
in the diagram, \\(\vec{fo}\\) bisects \\(\angle rfg\\). drag to correctly order the steps to solve for \\(x\\) and the measure of \\(\angle rfo\\).
note: angles are not drawn to scale.
\\(m\angle rfo = 36 + 24\\)
\\(24 = 11x - 9\\)
\\(12x + 24 = 23x - 9\\)
\\(33 = 11x\\)
\\(m\angle rfo = 12(3) + 24\\)
\\(x = 3\\)
\\(m\angle rfo = 60^{\circ}\\)
<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"tutor"
],
"needs_drawing": false,
"concepts_used": [
"Congruent Angles",
"Algebraic Angle Solving"
],
"new_concepts": [
"Angle Bisector Definition"
],
"current_concepts": [
"Angle Bisector Definition",
"Congruent Angles",
"Algebraic Angle Solving"
]
}
</pre_analysis>
<reasoning>
Identify the geometric relationship
Since ray \(FO\) bisects \(\angle RFG\), the two adjacent angles \(\angle RFO\) and \(\angle OFG\) are congruent.
Using the Congruent Angles knowledge point:
\[
m\angle RFO = m\angle OFG
\]
Set up the algebraic equation
Using the Algebraic Angle Solving knowledge point, substitute the given algebraic expressions:
\[
12x + 24 = 23x - 9
\]
Solve for x
Subtract \(12x\) from both sides:
\[
24 = 11x - 9
\]
Add \(9\) to both sides:
\[
33 = 11x
\]
Divide by \(11\):
\[
x = 3
\]
Calculate the measure of angle RFO
Substitute \(x = 3\) back into the expression for \(m\angle RFO\):
\[
m\angle RFO = 12(3) + 24
\]
Multiply:
\[
m\angle RFO = 36 + 24
\]
Add:
\[
m\angle RFO = 60^\circ
\]
Order the steps
By arranging the logical progression of equations, the correct order is:
- \(12x + 24 = 23x - 9\)
- \(24 = 11x - 9\)
- \(33 = 11x\)
- \(x = 3\)
- \(m\angle RFO = 12(3) + 24\)
- \(m\angle RFO = 36 + 24\)
- \(m\angle RFO = 60^\circ\)
</reasoning>
<answer>
The correct order of the steps to solve for \(x\) and the measure of \(\angle RFO\) is:
- \(12x + 24 = 23x - 9\)
- \(24 = 11x - 9\)
- \(33 = 11x\)
- \(x = 3\)
- \(m\angle RFO = 12(3) + 24\)
- \(m\angle RFO = 36 + 24\)
- \(m\angle RFO = 60^\circ\)
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Geometry",
"Angle Bisector Definition"
]
}
</post_analysis>
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<pre_analysis>
{
"quality": "clear",
"question_count": 1,
"skills_matched": [
"step_cot",
"explain_then_answer",
"tutor"
],
"needs_drawing": false,
"concepts_used": [
"Congruent Angles",
"Algebraic Angle Solving"
],
"new_concepts": [
"Angle Bisector Definition"
],
"current_concepts": [
"Angle Bisector Definition",
"Congruent Angles",
"Algebraic Angle Solving"
]
}
</pre_analysis>
<reasoning>
Identify the geometric relationship
Since ray \(FO\) bisects \(\angle RFG\), the two adjacent angles \(\angle RFO\) and \(\angle OFG\) are congruent.
Using the Congruent Angles knowledge point:
\[
m\angle RFO = m\angle OFG
\]
Set up the algebraic equation
Using the Algebraic Angle Solving knowledge point, substitute the given algebraic expressions:
\[
12x + 24 = 23x - 9
\]
Solve for x
Subtract \(12x\) from both sides:
\[
24 = 11x - 9
\]
Add \(9\) to both sides:
\[
33 = 11x
\]
Divide by \(11\):
\[
x = 3
\]
Calculate the measure of angle RFO
Substitute \(x = 3\) back into the expression for \(m\angle RFO\):
\[
m\angle RFO = 12(3) + 24
\]
Multiply:
\[
m\angle RFO = 36 + 24
\]
Add:
\[
m\angle RFO = 60^\circ
\]
Order the steps
By arranging the logical progression of equations, the correct order is:
- \(12x + 24 = 23x - 9\)
- \(24 = 11x - 9\)
- \(33 = 11x\)
- \(x = 3\)
- \(m\angle RFO = 12(3) + 24\)
- \(m\angle RFO = 36 + 24\)
- \(m\angle RFO = 60^\circ\)
</reasoning>
<answer>
The correct order of the steps to solve for \(x\) and the measure of \(\angle RFO\) is:
- \(12x + 24 = 23x - 9\)
- \(24 = 11x - 9\)
- \(33 = 11x\)
- \(x = 3\)
- \(m\angle RFO = 12(3) + 24\)
- \(m\angle RFO = 36 + 24\)
- \(m\angle RFO = 60^\circ\)
</answer>
<post_analysis>
{
"subject": "Mathematics",
"question_type": "Free Response",
"knowledge_point": [
"Mathematics",
"Geometry",
"Angle Bisector Definition"
]
}
</post_analysis>