In general call the shortest side a and remember this is always the side opposite the 30 degree angle. Then the other leg/side has length a(square root 3) and the hypotenuse has length 2a.
So in the case of a=7, the hypotenuse has length 14.
If the shortest leg of a 30-60-90 triangle has length 12, the length of the hypotenuse is: 24
Hypotenuse = 24
The hypotenuse is 30.
A 30-60-90 triangle has side lengths in a specific ratio: the shortest side (opposite the 30-degree angle) is half the length of the hypotenuse, the longest side (the hypotenuse) is twice the length of the shortest side, and the side opposite the 60-degree angle is ( \sqrt{3} ) times the length of the shortest side. If the shortest side is ( x ), then the hypotenuse is ( 2x ) and the longer leg is ( x\sqrt{3} ). For example, if the shortest side is 1, the hypotenuse would be 2, and the longer leg would be ( \sqrt{3} ).
30
6
6
22
24
22
14 units
You need the length of a side. Try sketching different size triangles with 30/60/90 degree angles - there's an infinite number of them. The length of the hypotenuse is the shortest side / sin30 or the third side / sin60. As sin 30 is 0.5 then the hypotenuse is twice the length of the shortest side (or the third side divided by ½root3 ).