The sum of all three angles of a triangle is 180 degrees. Given a right triangle whose one acute angle is 25 degrees. Let the other acute angle be x. Therefore,
[tex]\begin{gathered} x+90+25=180 \\ x+115=180 \\ x+115-115=180-115 \\ x=65 \end{gathered}[/tex]
Thus, the answer is 65.
