TP calculation with one dimension in polar coordinate

[SeasonLee]

Hello

I am calculating the position of a threaded hole on a casting part,one of the basic dimension is polar coordinate,attached is the part drawing and the way I am doing, will deeply appreciate if anyone who can give me a comment on my calculation, are there any easy way to calculate the position with polar coordinate.

Thanks in advance

Season

 

[SeasonLee]

Sorry for one attachment allowed to upload each time, here is the part drawing.

Season

 

[ringster]

It should be a simple calculation using the 2 legs of a rt triangle to determine the hypotenuse.

 

[drawoh]

SeasonLee,

Your calculations look good to me.

JHG