Create Plane from three points

after creating plane using Plane.setFromCoplanarPoints(A,B,C).
How can we use that plane object as planegeometry to add mesh?

The problem is that an instance of THREE.Plane has an infinite extension. So there is no origin point and no width or height property. It just divides the entire 3D space into two parts.

So unless you are not able to define those values upfront, there is no way to perform this conversion. If you can define those values, you can use the plane’s normal to orient the plane mesh like so:

const taret = mesh.position.clone().add( plane.normal );
mesh.lookAt( taret );