Use SOHCAHTOA ( this stands for sin opposite hypotenuse cos adjacent hypotenuse tan opposite adjacent)
You want the side opposite the angle and you have the hypotenuse so in this instance you would use sin...
sin (62) = x / 12
Multiply each side by 12 to get...
10.5954.... = x
To the nearest tenth it would be 10.6
Hope this helps! Any questions let me know :)