Question

help please........

Answer 1

A student made the table shown below to prove that XY is equal to YZ.
Sample Response


Statements Justifications

1. NY = MY Given



2. m∡MYX = m∡NYZ Given



3. m∡XNY = m∡ZMY Given


4.


5. m∡MYZ = m∡MYX + m∡XYZ Angle Addition Postulate



6. m∡MYZ = m∡NYZ + m∡XYZ Substitution



7. m∡NYX = m∡MYZ Transitive Property



8. triangleXYN ≅ triangleZYM ASA postulate



9. XY = ZY CPCTC

A. Provide the missing statement and justification in the proof.
B. Using complete sentences, explain why the proof would not work without the missing step.

Answer 2

@radar can usually get these questions. maybe he's figuring this out right now

Answer 3

Is there a figure that identifies all those points, segments, and angles for this sample?

Answer 4

oh sorry i forgot to post it .

Answer 5

Thanks I now have something to look at.

Answer 6

ok

Answer 7

At first brush I believe we are looking at two similar triangles, let look at it and read the steps.

Answer 8

ok.

Answer 9

To be honest, I can not see what step 4. should be, as it seems to prove it without any thing in step 4. I will continue to study it and see what they thought was necessary to be there.

Answer 10

ok. ima see if i can find a question similar so i can see what they are asking for as well? bc honestly i have no clue

Answer 11

Maybe something like this:
4. m<XYZ =180 - m<XYM-m<ZYN Form a straight line.
This is just a guess.

Answer 12

Do you have the choices (is this a multiple guess test?)

Answer 13

not its not a multiple choice but i have an idea of wat i thnk it is one secc let me relook and thnk n i'll show yu wat my guess is and yu tel me if it sounds correct

Answer 14

nvm i thought i had something i didnt realize it was already there

Answer 15

omg radar i know wats missing

Answer 16

an angle addition postulate is missing

Answer 17

It might be:
4,NX =MZ Congruent triangles MYZ and NYX (ASA) corresponding side.

Answer 18

no thats there. its #8 but ima link you to a similar question. and this is how i found out the angle postulate thats missing.

Answer 19

http://openstudy.com/study#/updates/4fb434b4e4b05565342a1a33

in this question its basically the same just different letters and a different missing part .but if you look carefully you can see the angle postulate they have then if yu look at my question one is missing

Answer 20

Would that be m<NYX=m<NYZ + m<XYZ Angle addition postulate
However, I thought they covered this in step 6 using substitution ????

Answer 21

one sec ima show you let me write it down first bc i really think thts it .

Answer 22

The figures are similar one is just flipped over from the other, I think you may be onto something.

Answer 23

BOOM.! i got it . ok look so its m<NYZ = m< NYZ + m< XYZ = ANGLE ADDITION POSTULATE

Answer 24

You have <NYZ twice is that a typo?

Answer 25

oh yea lol sorry

Answer 26

Do you mean m<NYX for the first one like I had in my post above.

Answer 27

rerun .........
BOOM ! i got it . ok look so its m<NYX = m< NYZ + m< XYZ = ANGLE ADDITION POSTULATE

Answer 28

look at my post, the 8th one above this one. We are on the same track.

Answer 29

I am still wondering about step 6 ......but I guess it is necessary.

Answer 30

omg i feel so smart

Answer 31

Good luck with these, these kind of problems are not my cup of tea. lol

Answer 32

oh . you've helped me figure out how to use my brain again lol now can i have to figure out how explain why the proof would not work without the missing step.

Answer 33

that was such a typo lol

Answer 34

I never had to do these when I was going through school.

Answer 35

thats crazy my classes are all about this . im tkn 3 math glasses in one .

Answer 36

Good luck with these, these kind of problems are not my cup of tea. lol

Answer 37

I guess you can say without that step you would not be able to prove the two triangles were congruent

Answer 38

haha typo again i ment math classes

Answer 39

It would be the angle side angle (ASA) postulate

Answer 40

Three math classes in one, obviously this is the "trig" part. Well it is pass my bedtime here in the Ozarks of MO. Agn good luck. & good night.

Answer 41

thank you very much and have a wonderful night .

Answer 42

I think you have your problem solved and no thanks to me, you did it on you own.

Answer 43

The figure shows triangle ABC. A segment joins point D on side BC and point E on side BA. Segment BD is 18 and segment BE is 14.

Which statement must be true to prove that segment DE is parallel to segment CA?

1 : EA = 2 : DC

6 : DC = 7 : EA

7 : EA = 9 : DC

4 : DC = 1 : EA

Answer 44

so whats the answer to part B ?

Answer 45

@radar @cemantha

Answer 46

As I said 2 yrs ago, it appears they proved triangles MYZ and NYX congruent using the ASA (AngleSideAngle) postulate without step 4, Then using corresponding parts of congruent triangles to prove XY and YZ equal.