<prompt> Angulation of the counter bevel placed in cast restoration is determined by:Amount of indicated involvement for faciallingual surfaceMeasured by the embracing angleAmount of needed retentionAll of the above  <response>: Angulation of the Counter BevelMeasured by the embracing angle: Angle between the bevel and the long axis of the crown - 30 to 70 degrees.Factors Determining the Angulation1. Amount of indicated involvement for the facial lingual surface:The more the desirable involvement is, the less will be the embracing angle to preserve tooth structure.2. Amount of needed retention:The shorter the preparation walls, the less will be the embracing angle with the long axis.May be parallel to the intracoronal wall proper.3. Type of cast alloy:The less the castability, the greater will be the embracing angle.Allows more bulk marginally. 