Which of these could be a step to prove that BC2 = AB2 + AC2? (6 points)

By the cross product property, AB2 = BC multiplied by BD.
By the cross product property, AC2 = BC multiplied by BD.
By the cross product property, AC2 = BC multiplied by AD.
By the cross product property, AB2 = BC multiplied by AD.

Question

Which of these could be a step to prove that BC2 = AB2 + AC2? (6 points)

 	
	By the cross product property, AB2 = BC multiplied by BD.
	By the cross product property, AC2 = BC multiplied by BD.
	By the cross product property, AC2 = BC multiplied by AD.
	By the cross product property, AB2 = BC multiplied by AD.

anonymous · Answer

attachment

anonymous · Answer

wait the second question i asked you the answer was the first one right about the altitude?

jingle535 · Answer

yes

anonymous · Answer

ok

jingle535 · Answer

Sorry I went to help someone else I am back now

anonymous · Answer

its fine

anonymous · Answer

i think it is the first one

jingle535 · Answer

This is in relation to Pythagorean theorem I am guessing?

anonymous · Answer

yeah and i hate these questions

anonymous · Answer

i think that because BC and BD need to cross multiply to prove they are similar

jingle535 · Answer

Are the answers like, AB^2 = BC * AD ?

anonymous · Answer

i think so

jingle535 · Answer

Yes I think its the first one

jingle535 · Answer

Sorry how they name the sides confused me

anonymous · Answer

probably because BC and DC are similar

anonymous · Answer

yeah i dont like how they named it

jingle535 · Answer

I found a good website for this, go http://www.regentsprep.org/regents/math/geometry/gp12/resourcemeanp.htm and look in the white box

jingle535 · Answer

There are many ways to prove the Pythagorean Theorem, this one just uses geometric means.