When adding sketch dimensions from an arc, a radius dimensions will be added by default. However, by select the two end points of the arc and selecting the line of the arc, a perimeter dimension of the arc will be created. Creating a dimension on circle is fast and easy. What about perimeter circle? The image is showing a radius dimensions. The smart dimensions that we see the image shows R.
The differences between this two dimensioning will be the icon that is over the numbers.
The purpose of this relation is to align these two sketches to have equal distance from the centerline.
Steps in creating this symmetric
Step 1: Multiple select the entities using CTRL key and select 3 different entities to call out the relations call symmetric (Centreline must presents for the relationship to works)
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