# Equation Driven Curve PropertyManager

The Equation Driven Curve tool lets you create a curve by defining the equation for that curve.

To open this PropertyManager:

Select an existing equation driven curve or create a new one (for example, by clicking Equation Driven Curve tool (Sketch toolbar) or ).

When you create equation driven curves, the values you use must be in radians.

You cannot use global variables directly for equation driven curves. However, you can create a global variable and associate it with a dimension, then use the dimension in the equation for the curve.

## Add Relations

If you select an existing curve, you can add relations to the selected entity. The list includes only relations that are possible for the selected entity.

## Options

If you select an existing curve, click For construction to convert the entity to construction geometry.

## Equation Type

Explicit | Lets you define X values for the start and endpoints of the range. Y values are calculated along the range of X values. |

Parametric | Lets you define T values for the start and endpoints of the range. You can define an equation for X values and another equation for Y values. Both equations are solved along the range of T values. Only parametric curves are available in 3D sketches. |

## Parameters

**Parent topic**Equation Driven Curves