Why is a rectangle not a closed shape, and how to check what is missing to make it so?

w_s856

Context: https://cad.onshape.com/documents/efbbafb6b05d800790768197/w/c4dfe0ff6af112e209c97839/e/6f9f974ebe221e28245df213?renderMode=0&uiState=68985fb7e6664d4942c8db08, specifically Sketch 1

I used points from another shape and mirrored shapes but the resulting four rectangles are not perceived as closed areas

Question 1: why is it so? (my guess is that there is a point missing somewhere? Or that constraints of one line are on a point different from the other line?)

Question 2: how can I see the elements added in a sketch (as opposed to the ones used from another - I am not sure if when using a feature it becomes part of the new sketch, or just a reference)

Question 3: is there a mechanism to check wht is missing for a shape to be closed?

robert_scott_jr_

Question 1: I guess you got it fixed. Looks ok to me; just a few undimensioned construction lines.

Question 2: Show constraints; elements with a 'Used' constraint will be highlighted.

Question 3:

w_s856

https://forum.onshape.com/discussion/comment/119792#Comment_119792

Thanks, but no, it did not get fixed - the four rectangles in Sketch 1 do not form shapes (4 shapes). It looks like the lines that compose them are not sewn together (the rectangle is not filled in with a darker shade). The consequence is that I cannot extrude them (they are meant to be attachments for the servos to fit in)

As for the errors - there are none ("no loose ends")

MDesign

The rectangles are fine. but when your doing in context design it won't let you select things directly behind the context parts. You must either turn off the context parts with the hide/show button or use right click on the rectangle and pick select other to get to the underlying selections.