**What Are the Two Types of Constraints in AutoCAD?**

When working with AutoCAD, you may come across the term “constraints” quite often. Constraints are a powerful feature that allows you to maintain relationships between different elements in your drawing.

They ensure that your design remains accurate and consistent throughout the editing process. In AutoCAD, there are two main types of constraints: geometric constraints and dimensional constraints.

## Geometric Constraints

Geometric constraints are used to control the geometric properties of objects within your drawing. With geometric constraints, you can specify the size, shape, and position of objects relative to each other.

__The most commonly used geometric constraints include:__

**Horizontal**: This constraint ensures that a line or object is horizontal.**Vertical**: This constraint ensures that a line or object is vertical.**Parallel**: This constraint ensures that two lines or objects remain parallel to each other.**Perpendicular**: This constraint ensures that two lines or objects intersect at a right angle.**Tangent**: This constraint ensures that an arc or circle is tangent to another object.**Coincident**: This constraint ensures that two points coincide with each other.

By applying these geometric constraints, you can maintain the desired relationships between different elements in your drawing. This helps in creating accurate and precise designs while saving time by automating certain tasks.

## Dimensional Constraints

In addition to controlling the geometry of objects, AutoCAD also provides the capability to apply dimensional constraints. Dimensional constraints are used to control the size and position of objects based on specific measurement values.

__The most commonly used dimensional constraints include:__

**Distance**: This constraint ensures that the distance between two points or objects remains constant.**Radius**: This constraint ensures that the radius of an arc or circle remains constant.**Angle**: This constraint ensures that the angle between two lines or objects remains constant.**Diameter**: This constraint ensures that the diameter of a circle remains constant.

By applying these dimensional constraints, you can easily modify the size and position of objects in your drawing by simply changing their associated measurements. The rest of the design will automatically adjust accordingly, maintaining the desired relationships defined by these constraints.

## In Conclusion

Geometric and dimensional constraints are essential tools in AutoCAD that allow you to maintain accurate and consistent designs. Geometric constraints control the shape, size, and position of objects, while dimensional constraints control specific measurements. By understanding and utilizing these two types of constraints effectively, you can enhance your productivity and create precise drawings in AutoCAD.