Answer:
2:4:2squarerootof3
Explanation:
30:60:90 triangles have a ratio of 1:2:square root of three
If the middle side is 4 (2 to 4), we can assume this ration is doubled. So the short side would be 2 and the long side would be 2 square root of 3.
I hope this helps!!!
~LampteyJ