alleryThe cone used to define conics is described as double:
ANapped
BNested
CNotched
DKnotted
Answer & Solution
Correct answer: A. Napped
1. Two cones meet at their common vertex.
2. One opens upward and one downward.
3. It is a double napped cone.
_Source: syllabus Mathematics, Ch 10 'Conic Sections'_
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