rounding path corners in SVG

I am working on an svg export from and android app. In android, there is an option to round the corners of paths and i want to recreate this in my SVG file. but there only sseems to be rounded corner options for rectangles and not path objects.

I don't want to go down 开发者_StackOverflow社区the road of adding points into the path too recreate it as the file then wont be the same in an external editor (i.e. inkscape)

and example is here: the SVG file: it downloads as the server isnt configured correctly. http://www.robmunro.net/misc/tri.svg

here is a bitmap version of what it should be:

http://www.robmunro.net/misc/tri.png

Will award points or good answers.