I can't understand this proof: =/

- anonymous

I can't understand this proof: =/

- katieb

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- anonymous

##### 1 Attachment

- anonymous

Sorry Turing, I still don't get it.

- Hero

Level of difficulty increased when put in espanol

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- anonymous

I'm writting the traslation Hero. wait.

- anonymous

Let P a poin outside the line XY; PO a line perpendicular from P to XY, and PZ another line drawn from P to XY. Prove that PZ is not perpendicular to XY.

- anonymous

TuringTest already helped me to prove it(He did it actually) but the thing is that I can't understand the proof that is given in the book.

- TuringTest

what is "recto" ?

- TuringTest

when it says "son rectos"

- anonymous

recto = 90 degrees

- TuringTest

that's what I thought

- anonymous

I don't get the line before the last one.

- anonymous

Ohh I think I get it =)!

- anonymous

The number 34 says. un angulo recto es la mitad de un angulo de lados colineales.

- anonymous

It was proved that the angle P'ZP has not colineal sides. and then proved that angle OZP is half angle P'ZP.

- anonymous

It proved that OZP is half of an angle that is not a 90ยบ angle.

- anonymous

I think I understand now but I'm still incapable of doing that kind of proofs by myself. =/

- TuringTest

It seems so excessive. I couldn't do the proof myself like this, you saw my way. I'm not so sure I care to do proofs like this frankly :P

- anonymous

What do you mean by excesive?

- TuringTest

too much more work than is necessary/needed

- anonymous

Do you think I should study from another book instead?

- TuringTest

depends what you want to learn I guess

- anonymous

Well I want to learn geometry and learn how to make proofs.

- TuringTest

then I guess this is the kind of stuff you should be learning I'm not that rigorous myself good for you though ;)

- anonymous

Well thank you then =). I hope to have learn by the end of this year. If everything goes right.

- amistre64

one problem i see is that it is sideways

- anonymous

I'm sorry amistre64. =/

- anonymous

I couldn't fix that quickly

- amistre64

i think this is a rendition of euclids elements

- anonymous

a rendition?

- anonymous

what is that?

- anonymous

Actually I wanted to study Ecuclid's elements. But I started doing this book before. So I don't want to start again.

- amistre64

http://aleph0.clarku.edu/~djoyce/java/elements/bookI/propI12.html they might give you some insight into it tho

- anonymous

Wooww thank you amistre64!

- amistre64

de nada

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