Question

In the given triangle ABC, angle A is 90degrees and segment AD is perpendicular to segment BC.
Which of these could be a step to prove that BC squared = AB squared + AC squared?

A: Segment AD : segment CD = segment BD : segment AD, since triangle ADB is similar to triangle CDA.
B: Segment AC : segment DA = segment BC : segment AC, since triangle ABC is similar to triangle DAC.
C: Segment BC : segment AC = segment AC : segment DC, since triangle ABC is similar to triangle DAC.
D: Segment BD : segment BA = segment BA : segment CA, since triangle ADB is similar to triangle CDA.

Answer 1

possible hint

h^2=x*y

use that formula