| 翻訳と辞書 | Wallis's conical edge| Wallis's conical edge  : ウィキペディア英語版 | 
 
 Wallis's conical edge  is a ruled surface given by the parametric equations:
 :
 where ''a'', ''b'' and ''c'' are constants.
 Wallis's conical edge is also a kind of right conoid.
 Figure 2 shows that the Wallis's conical edge is generated by a moving line.
 Wallis's conical edge is named after the English mathematician John Wallis, who was one of the first to use Cartesian methods to study conic sections.()
 == See also ==
 
 * Ruled surface
 * Right conoid
 
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