Question

Hillary is using the figure shown below to prove Pythagorean Theorem using triangle similarity:

In the given triangle ABC, angle A is 90o and segment AD is perpendicular to segment BC.

http://prnt.sc/di4rz3

Which of these could be a step to prove that BC2 = AB2 + AC2?
By the addition property of equality, AC2 plus AD2 = AB multiplied by DC plus AD2.
By the addition property of equality, AC2 plus AD2 = BC multiplied by DC plus AD2.
By the addition property of equality, AC2 plus AB2 = AB multiplied by DC plus AB2.
By the addition property of equality, AC2 plus AB2 = BC multiplied by

Answer 1

DC plus AB2.