Question 762431
If one angle is 31 degrees, then the other is 
59 degrees. (90 + 59 + 31 = 180)
Sin = Opposite/Hypotenuse
Sin 59 = Opposite/7
Opposite = 7 * sin(59)
         = 6ins
Sin31 = Opposite/7
Opposite = 7*sin(31)
         = 3.6ins
Length of two legs 6ins and 3.9ins
Hope this helps.
:-)