There is a right triangle with hypotenuse length 42. The two sides are x and 38. Find x.
Choices:
A:8 \sqrt { 2 }
B:8 \sqrt { 3 }
C:8 \sqrt { 5 }
D:8 \sqrt { 7 }
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: There is a right triangle with hypotenuse length 42. The two sides are x and 38. Find x.
Choices:
A:8 \sqrt { 2 }
B:8 \sqrt { 3 }
C:8 \sqrt { 5 }
D:8 \sqrt { 7 }
Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
Question: There is a right triangle with hypotenuse length 42. The two sides are x and 38. Find x.
Choices:
A:8 \sqrt { 2 }
B:8 \sqrt { 3 }
C:8 \sqrt { 5 }
D:8 \sqrt { 7 }