Answer:
The triangles can be congruent but not always.
The triangles do not have to be congruent, but they have to be similar.
Step-by-step explanation:
See the attached diagram with this answer.
For any line (say OP), if you draw two right triangles ( Δ ABC and Δ A'B'C') using the line, OP as the hypotenuse, then the triangles can be congruent. This will be only when AC = A'C'.
That means if we draw two right triangles using the same length of a straight line as hypotenuse, then only the two right triangles will be congruent.
Now, If AC = A'C' then automatically, it becomes AB = A'B' and BC = B'C' and then by SSS criteria, the triangles Δ ABC and Δ A'B'C' will be congruent i.e. Δ ABC ≅ Δ A'B'C'.
But the triangles Δ ABC and Δ A'B'C' do not have to be congruent but they have to be similar.
Because, [tex]\frac{A'B'}{AB} = \frac{B'C'}{BC} = \frac{A'C'}{AC}[/tex]
If this ratio becomes 1 : 1 then only those triangle will be congruent otherwise they will be similar only. (Answer)