Seth is using the figure shown below to prove pythagorean theorem using triangle similarity: in the given triangle abc, angle a is 90° and segment ad is perpendicular to segment bc. the figure shows triangle abc with right angle at a and segment ad. point d is on side bc. which of these could be a step to prove that bc2 = ab2 + ac2? (6 points) a) by the cross product property, ab2 = bc multiplied by bd. b) by the cross product property, ac2 = bc multiplied by bd. c) by the cross product property, ac2 = bc multiplied by ad. d) by the cross product property, ab2 = bc multiplied by ad. *i think the answer could be d but i'm not sure.