Question 550879
look and see.  It's common sense. This is drawn to scale.  
The wider the angle opens, the bigger the side it subtends:

{{{drawing(200,500/3,-1,11,-1,9,

triangle(0,0,10,0,3,8.486281374),
locate(0,0,y), locate(10,0,Z), locate(3,9,X)   )}}}

Edwin</pre>