Transform tool does not rotate according to centroid

Question

I am using Adobe Illustrator to rotate a triangular object.

I found that using the Effect -> Distort and Transform -> Transform rotation works different than a standard rotation made possible during scaling.

To 'illustrate' this problem, I attached a picture below to show how the standard rotation transforms my triangle.

Notice how all sides of the triangle touch the circle, since it is a perfect triangle. Now when I standard rotate it, it still does this.

This makes perfect sense. Now when I use the Effect -> Distort and Transform -> Transform tool, the rotation does something (to me) unexpected.

How come that the latter transform tool does not rotate according to the centroid? How to solve this?

Answer 1

Illustrator will follow the center of the bounding box when trying to rotate. The center of the bounding box, is not the same as the centroid.

Bounding Box center point:

Centroid:

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To fix this, group them together for the transform (that's how I do it) and you can un-group them afterwards.

They will then follow the bounding box of the circle not the triangle.

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See this post for more info.