To find the length of the hypotenuse of a right triangle with the two other sides measuring 20 and 30, you can use the Pythagorean theorem, which states:
\[ c^2 = a^2 + b^2 \]
where \(c\) is the hypotenuse and \(a\) and \(b\) are the other two sides. In this case, let \(a = 20\) and \(b = 30\).
Now plug in the values:
\[ c^2 = 20^2 + 30^2 \] \[ c^2 = 400 + 900 \] \[ c^2 = 1300 \]
Now, take the square root of both sides to find \(c\):
\[ c = \sqrt{1300} \] \[ c \approx 36.0555 \]
Rounding to the nearest hundredth, the length of the hypotenuse \(c\) is approximately:
\[ \boxed{36.06} \]