How to do tangential mating in Catia software?

How can I mate a circular disc to a cuboidal surface tangentially in a Catia Software?

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In a CATIA assembly, there is no direct way to constrain a circular part to make it tangent to a flat face on another part. However, there are several methods to achieve the tangent condition:

a. Add an offset constraint between the center axis of the cylinder to the flat face, with the offset distance = the cylinder radius,

or

b. add a tangent plane to the cylinder part. Then constrain the plane coincident to the flat face of the cuboid part.

etc.

 
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