Trouble with formulation of an analytic geometry question I'm having trouble understanding a certain question, so I am asking for an explanation of it. The question is asked in a different language, so my translation will probably be mistake-ridden, I hope you guys can overlook the mistakes (and of course correct them):
Show that for each $ a $ the circle $ (x-a)^2 + (y-a)^2 = a^2 $ touches the axes.
This is literally how the question is formulated, I'm sure that it isn't a hard question so if one of you can explain what they mean by this question I would appreciate it!

A slightly different take on your question would be to realize that if your circle touches the $Y$ axis, it must do so at a point $(0, y)$. Substitute $x=0$ in the equation of your circle; can you find a value for $y$?  The answer for touching the $X$ axis can be found in a similar way. 
