Question 535902
Let me superimpose those triangles, except I'll make the angles 40 and 45 degrees so the difference can be seen.
{{{ drawing( 350, 225, -1, 13, -1, 8,
circle( 0, 0, 10 ), locate( 0, 0, T), locate( -0.5, 0.5, W),
  triangle( 0, 0, 12.5, 0, 7.66, 6.43 ),
  triangle( 0, 0, 12.5, 0, 7.07, 7.07 ), 
  locate( 12.5, 0, S ), locate( 12.5, 0.8, V), locate( 7.75, 6.9, U ), locate( 7.15, 7.5, X )
)}}}I superimposed ST and VW. With congruent adjacent sides, larger angle opposes longer side.