Final answer:
The length of the hypotenuse can be found using the Pythagorean theorem by calculating the square root of the sum of the squares of the two legs.
Step-by-step explanation:
The length of the hypotenuse of a right triangle can be found using the Pythagorean theorem, which states that the square of the hypotenuse is equal to the sum of the squares of the two legs. In this case, if each of the two legs is 7 units, then the length of the hypotenuse can be found using the equation:
c = √(a² + b²) = √(7² + 7²) = √(49 + 49) = √98.
Therefore, the length of the hypotenuse is the square root of 98 (option c).