Needs Answer
It seems that the point (x,y) is set to be (10,10) by default.
Open GeoGebra Classic 5Type "Distance((x, y), xAxis)" into the input bar
Then it shows: a=10
???
Files:
(x,y)=(10,10).ggb
The same question 
It seems that the point (x,y) is set to be (10,10) by default.
Open GeoGebra Classic 5Type "Distance((x, y), xAxis)" into the input bar
Then it shows: a=10
???
or DIstance((x,y), (-10,-10))
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