Question

Will give medal! Already have an answer, need someone to check it!
Seth is using the figure shown below to prove Pythagorean Theorem using triangle similarity:
In the given triangle ABC, angle A is 90 degrees and segment AD is perpendicular to segment BC.

Answer 1

Which of these could be a step to prove that BC^2 = AB^2 + AC^2?
A.Triangle ADC is similar to triangle BAC by the SAS Similarity theorem.
B.Triangle ADB is similar to triangle CDA by the SAS Similarity theorem.
C.Triangle ADC is similar to triangle BAC by the AA Similarity theorem.
D.Triangle ADB is similar to triangle CDA by the AA SImilarity theorem.
My answer is C.

Answer 2

@dan815