where is the sketch origin?

[KarolR]

I made sketch 4, the circle.

Although i projected the origin, i cannot dimension the center of the circle to it, nor to the triad of the axes i see.

Are all sketch origins projections of the original coordinate system, and if not, are they where the axis triad is?

Flange.ipt

[KarolR]

I found it, the sketch origin. it was a point somewhere, but, how to find it?

[JD Mather]

In sketch1 you do not need the 60° angle dimensions - use equal (=) constraints on the three lines.

In fact, if you had used the Polygon tool to create the triangle Inventor would have done this for you.

 

[JD Mather]

The origin is always projected perpendicular to the sketch plane.

It is projected correctly (see image).

 

If you want the circle placed at the point defined by Sketch3, then you need to Project Geometry that point into Sketch4.