Lengkung

Dalam matematik, sebuah lengkung adalah suatu objek geometri yang merukanan satu-dimensi dan berterusan. Banyak lengkung khusus telah dipelajari dalam geometri, bermula daripada bulatan.

Lengkung boleh naik dan turun. Boleh naik sahaja atau turun sahaja.

Rujukan 
 
 
 Euclid, commentary and trans. by T. L. Heath Elements Vol. 1 (1908 Cambridge) Google Books
 E. H. Lockwood A Book of Curves (1961 Cambridge)

Pautan luar 
Famous Curves Index, School of Mathematics and Statistics, University of St Andrews, Scotland
Mathematical curves A collection of 874 two-dimensional mathematical curves
Gallery of Space Curves Made from Circles, includes animations by Peter Moses
Gallery of Bishop Curves and Other Spherical Curves, includes animations by Peter Moses
YAN Kun. Research on adaptive connection equation in discontinuous area of data curve. 
 The Encyclopedia of Mathematics article on lines.
 The Manifold Atlas page on 1-manifolds.

Matematik