Question

MEDAL AND FAN! Easy Geometry question!

Seth 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.

Answer 1

Which of these could be a step to prove that BC2 = AB2 + AC2?

a. By the cross product property, AB^2 = BC multiplied by BD.
b. By the cross product property, AC^2 = BC multiplied by BD.
c. By the cross product property, AC^2 = BC multiplied by AD.
d. By the cross product property, AB^2 = BC multiplied by AD.

Answer 2

I can't figure out whether it's C or D, but I'm leaning towards D.

Answer 3

Btw, it wasn't D so I'm assuming it's C, but idk :/