Opposite side = 12
Adjacent side = 35
The Pythagorean theorem consists of a formula a^2+b^2=c^2 which is used to figure out the value of (mostly) the hypotenuse in a right triangle.
[tex]\begin{gathered} c=\sqrt[]{35^2+12^2} \\ c=37 \end{gathered}[/tex]Hypothenuse = 37
[tex]\frac{OS}{AS}=\frac{12}{35}[/tex][tex]\frac{OS}{H}=\frac{12}{37}[/tex]