Tangented arc with circle mirror problem

[polovincak.tomas]

Hi,

i have problem with, how i think, simple sketch where is arc tangented to circle and connected to rectangle. When sketch one part everithing seams to by fully constrained(picture 1). When I mirror parts twice still OK(picture 2 and 3) but fourth part break everithing and sketch isnt fully constrained anymore(picture 4). Could someone help where I have problem?

picture 1

picture 2

picture 3

picture 4

thanks

[TrippyLighting · Accepted solution]

The mirror operator as currently implemented is outright evil!

It's is one of the weakest parts of the Fusion 360 sketch engine for several reasons.

It is also often easy to avoid and hopefully so in this case as well.

Simply finish your quarter sketch and then mirror the solid body resulting from it with the Create->mirror command.