Arranges occurrences of a feature or body into an arc or circular pattern.
Duplicates one or more features or bodies and arranges the resulting occurrences by a specific count and spacing in an arc or circle.
Access
Ribbon:
3D Model tab
Pattern panel
Circular
Pattern individual features -
Use to pattern individual solid features, work features, and surface features. Assembly work features cannot be patterned.
Features selects solid features, work features, or surface features to include in the pattern. Selecting multiple features for duplication in a pattern increases calculation time. 
Solid is available if the part file contains more than one solid body. Selects the solid body to receive the pattern. Finish features such as fillets and chamfers can be included in a pattern only if their parent feature is also selected. The same is true for a delete face feature.
Pattern a solid -
Use to pattern a solid body, including features that you cannot pattern individually. The pattern can also include work and surface features.
Not available in an assembly.
Include Work/Surface Features selects one or more work or surface features from a part to pattern. Solid Available if the part file contains more than one solid body. Only one solid body can be included in the pattern. 
Join -
Attaches the pattern to the selected solid body. Use to pattern the solid as a single unified body.
Create new bodies -
Creates a pattern consisting of multiple individual solid bodies.
Rotation axis -
Specifies the axis (pivot point of angle) about which occurrences are repeated. The axis can be on a different plane from the feature being patterned.
Flip -
Reverses direction of the pattern. When Midplane is selected and the occurrence count is even, flip indicates which side gets the extra occurrence.
Placement
Defines the number of occurrences in the pattern, the angular spacing between occurrences, and the direction of the repetition.
Count -
Specifies the number of occurrences in the pattern.
Angle -
Angular spacing between occurrences depends on the positioning method. If you select Incremental positioning, the angle specifies the angular spacing between occurrences. If you choose Fitted positioning, the angle specifies the total area the pattern occupies.
A negative value can be entered to create a pattern in the opposite direction.
Midplane -
Specifies to distribute the feature occurrences on both sides of the original feature, which is typically created in a centered location. When the occurrence count is even, use Flip to determine which side gets the extra occurrence.
(More)
Determines the method for calculating and positioning the patterned features.
- Creation Method
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Optimized Creates identical copies of selected features by patterning feature faces. Optimized is the fastest compute method. Limitations are the inability to create overlapping occurrences or occurrences that intersect different faces than the faces of the original features. Use where possible to speed up pattern compute.
Identical Creates identical copies of selected features by replicating the results of original features. Use for identical features when the optimized method is not possible.
Adjust Creates potentially differing copies of selected features by patterning features and calculating extents or terminations of each pattern occurrence individually. Computation time is lengthy for patterns with large numbers of occurrences. Preserves design intent by allowing pattern occurrences to adjust based upon feature extent or termination conditions, such as a feature that terminates on a model face.
Note: Not available for patterns of solid part bodies in an open or surface state. - Positioning Method
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Incremental defines the spacing between features. You specify the number of occurrences in the pattern and the angle. The total area occupied by the pattern is calculated.
Fitted patterns use an angle to define the total area the patterned features cover. You specify the number of occurrences and the total angle. Spacing between occurrences is calculated. If the design is likely to change, use Fitted positioning, because the spacing of occurrences updates according to design intent.