EntityQ2518149· pop 12· linked from 36 articlesconical surfaceSign in to saveunion of all the straight lines that pass through a fixed point and intersect a fixed space curveConnectionsgeometryEntityInternational Standard Book NumberEntitylineEntityconeEntitycylinderEntityellipseEntityconic sectionEntitycurveEntitythree-dimensional spaceEntityprojective geometryEntityquadricEntitybounded setEntityruled surfaceEntityplane curveEntitydevelopable surfaceEntitysurfaceEntityparametrizationEntityCategoriesEuclidean solid geometrySurfaces