Because this is a 30-60-90 triangle, you need these formulas: Short leg= S (The short leg is always across from the 30) Long leg= S√3 (The long leg is always across from the 60) Hypotenuse= 2S. (The hypotenuse is always across from the 90)
So you know the short leg is 17. So S= 17. Now you just plug in 17 for the other formulas. Long leg (which is X)= 17√3 The hypotenuse (which is Y)= 17(2)= 34.