deleted

[hannahBPS]

deleted

[mhiserZFHXS]

Scratch what I wrote before.

Draw one reference line between lines A and B, where the base of your extrusion is now. Use trig to control the sides of that little triangle you now have so that the new line is always 1 1/2" and constrain your extrusion to the new line.

[ToanDN]

Maybe I misunderstood but what you are asking cannot be done with what you show.  The shape can only move within a limited range (see the 1.5" R blue circle) until it will disconnect from ref B.  Maybe show a sketch of your end goal instead of piecemeal information then we may suggest a different approach overall.

[mhiserZFHXS]

@ToanDN 

Not if it rotates, which is what I interpreted, but maybe I'm wrong?

[ToanDN]

---

@mhiserZFHXS wrote:

@ToanDN 

Not if it rotates, which is what I interpreted, but maybe I'm wrong?

---

It doesn't matter if the shape rotates or not.  1.5" from the intersection of the 2 ref planes is the limit.

[mhiserZFHXS]

It's not 1 1/2 inches from the intersection. It's just a 1 1/2" line between those two planes. There are an infinite number of ways that could be oriented.

[ToanDN]

---

@mhiserZFHXS wrote:

It's not 1 1/2 inches from the intersection. It's just a 1 1/2" line between those two planes. There are an infinite number of ways that could be oriented.

---

Oriented, yes.  But neither of the two corners can be more than 1.5" from the intersection.  Feel free to correct me by showing a sketch of a such condition.

[barthbradley]

Post a photograph of this pergola you are trying to model, as well as your RFA.  Maybe then we can help you find a solution.  Right now, you are only giving us a puzzle piece that may or may not fit - or even belong.  Know what I mean? 

[mhiserZFHXS]

@ToanDN 

Ah, yea, but I don't THINK that's OP's intention. But I don't know since they've gone quiet.

[barthbradley]

---

@mhiserZFHXS wrote:

@ToanDN 

Ah, yea, but I don't THINK that's OP's intention. But I don't know since they've gone quiet.

---

OP has not only gone quiet but has deleted post.   Too bad. I was really curious to know what that puzzle piece was all about.  😉