MATHEMATICS A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site helix A circular helix (right) and cylindroconical helix (left). In each case the curve (red) makes a constant angle with the elements (e.g., the blue lines) in the surface on which it is draw. A curve in three dimensions, the tangent to which makes a constant angle with a fixed line. A circular helix is formed by winding a line around a cylinder so the radius is always the same. A conical helix is formed by winding a line around a cone, so that, consequently, its radius constantly changes. Springs often take the form of various kinds of helices. In nature, the DNA molecule is in the shape of a double helix. Related category    • MATHEMATICS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP