Consider a right triangle where one of the angles is $30^{ ext{o}}$. The length of the side opposite this angle is 4 units. Using the properties of trigonometric ratios, calculate the length of the hypotenuse of this triangle.
Recall that for a $30^{ ext{o}}$ angle in a right triangle, the sine function gives the ratio of the length of the opposite side to the length of the hypotenuse.
According to the sine definition, we have:
$$ ext{sin}(30^{ ext{o}}) = rac{ ext{opposite}}{ ext{hypotenuse}} $$
Here, $ ext{opposite} = 4$. Determine the length of the hypotenuse.