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No apology necessary. I'm happy to have been able to provide a quick solution. For once my pencil and paper worked more quickly than my software.
Because of the fact that Flux does not tell you when a post has been put just prior to yours, I was posting for your posts and did not see any of his!
No, no. I just stated that we do not need the length of AB.
I am sorry, your comment in post #21 confused me. I already solved this in post#20. I thought you had found something wrong with that answer, and got mixed up.
Here's my diagram.
MX changes too because it is a perpendicular bisector of AB. If AB lengthens MX will change too.
It does. But it stays the same as MX.
In my diagram and if Y is the point on AC where XY is perpendicular to AC then
I am looking at it now. If you change AB the distance varies.
We do not need it. Did you try drawing a picture in GG and then changing AB?
Of course we need AB but it is given.
We do not need the length of AB.
Is it just me or do we not need the length of AB in the last question?