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When the cutting plane is at ninety degrees to the axis, the section is a:
AChord
BCusp
CCircle
DCuboid
Answer & Solution
Correct answer: C. Circle
1. The plane is square on to the cone.
2. The cut is perfectly symmetric.
3. The section is a circle.
_Source: NCERT Class 11 Mathematics, Ch 10 'Conic Sections'_
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