# Curve

Curve, (horizontal, circular)

Definable with certain elements (some outlined below)

**Radius**: The distance from the center point of the curve and perpendicular to any point on it.

**Delta**: Expressed typically in DMS format and the internal angle between the radius lines at the beginning and end of the curve.

**Arc**: The length of the curve following along its’ concave/convex shape.

**Tangent**: The imagined line extended from the line entering the curve to the point where the exiting tangent intersects. This is expressed as a length.

**Chord**: Usually expressed with a bearing and distance is the imagined straight line between the start and end of the curve.

**Right or Left**: These refer to the direction the curve turns as observed from the beginning of the curve.