What can you conclude about two right triangles whose hypotenuses are formed by the same line? a. the triangles are congruent. b. the triangles are horizontal. c. the triangles are similar. d. the triangles are vertical.

If two right triangles have a hypotenuse that is formed by the same line, what you essentially have is two right triangles with the same hypotenuse.

In other words, you have a right triangle reflected about its hypotenuse, creating a second, congruent right triangle.

Hope this helps!