There are two right triangles D F E and A C B. Find D E.
Choices:
A:3
B:4
C:6
D:9
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: There are two right triangles D F E and A C B. Find D E.
Choices:
A:3
B:4
C:6
D:9
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 are two right triangles D F E and A C B. Find D E.
Choices:
A:3
B:4
C:6
D:9