What command in the Relate group is used to create a tangent relationship?

The command that creates a tangent relationship is designed to establish a geometric connection between two curves, such as an arc and a line or two arcs, ensuring that they touch at a single point and share the same tangent direction at that point. This is crucial in constrained modeling, where the intent is to maintain specific geometric relationships to control the design effectively.

When two entities are defined as tangent, they behave in a manner that allows for smooth transitions in the geometry, which is especially important in applications like product design where visual aesthetics and functional interactions are key. A tangent relationship ensures that when one curve is modified, the other adjusts accordingly to maintain the tangent condition, enhancing the flexibility and adaptability of the model.

In contrast, the other commands in the Relate group serve different purposes. The collinear command is used to align two lines along the same infinite line, horizontal constrains a line to lay on a horizontal axis, and the fixed command secures an object in a specific location, preventing any further movement. Each of these commands plays a role in constraint management, but none of them establish the specific tangent relationship that the question focuses on.