Question

I can't understand this proof: =/

Answer 1

Sorry Turing, I still don't get it.

Answer 2

Level of difficulty increased when put in espanol

Answer 3

I'm writting the traslation Hero. wait.

Answer 4

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.

Answer 5

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.

Answer 6

what is "recto" ?

Answer 7

when it says "son rectos"

Answer 8

recto = 90 degrees

Answer 9

that's what I thought

Answer 10

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

Answer 11

Ohh I think I get it =)!

Answer 12

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

Answer 13

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

Answer 14

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

Answer 15

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

Answer 16

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

Answer 17

What do you mean by excesive?

Answer 18

too much
more work than is necessary/needed

Answer 19

Do you think I should study from another book instead?

Answer 20

depends what you want to learn I guess

Answer 21

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

Answer 22

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

Answer 23

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

Answer 24

one problem i see is that it is sideways

Answer 25

I'm sorry amistre64. =/

Answer 26

I couldn't fix that quickly

Answer 27

i think this is a rendition of euclids elements

Answer 28

a rendition?

Answer 29

what is that?

Answer 30

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

Answer 31

http://aleph0.clarku.edu/~djoyce/java/elements/bookI/propI12.html

they might give you some insight into it tho

Answer 32

Wooww thank you amistre64!

Answer 33

de nada