Find the length of the hypotenuse if the length of one of the legs is 2 cm, and the length of the second leg is 28 cm.

The solution of the problem:
1. To search for the hypotenuse, the Pythagorean theorem is used.
It can be briefly written as follows:
hypotenuse ^ 2 = first leg ^ 2 + second leg ^ 2;
2. Based on this formula, we calculate the hypotenuse:
2 ^ 2 + 28 ^ 2 = 788;
hypotenuse = √788 = 2√197 (cm).
Answer: the length of the hypotenuse is 2√197 cm.