Question

In which line did the student make the first mistake?
Line 2
Line 4
Line 5
Line 3

Answer 1

the content in line 4 is correct but she doesn't need it to prove using SAS....
the first error is then line 5.
but in terms of the proof, i'd say it's line 4....

Answer 2

So, you'd go with line 5?

Answer 3

I mean for what this question is asking.

Answer 4

for what the question is asking, she is going to prove the triangles are congruent by SAS correspondence. DE is not the correct correspondence...
i'd go with 4....

Answer 5

what would you say?

Answer 6

I'd say 4. I'm going to submit soon. Hope it's right ! :)

Answer 7

lemme get second a second opinion...

Answer 8

@Callisto , please help..

Answer 9

@Arnab09 , second opinion?

Answer 10

I think that's best!

Answer 11

line 5

Answer 12

@ninhi5 , @RaphaelFilgueiras , second opinion?

Answer 13

look in line five

Answer 14

You don't agree it's line 4, @RaphaelFilgueiras ?

Answer 15

2.83aprox 4.47

Answer 16

right, that's the error.. but what about the error for the proof?

Answer 17

i'd say 5 there is no way AB=DE

Answer 18

line 5?
line 4 is correct
But he/she made a mistake when comparing AB and DE

Answer 19

yeah... line 5 is blatantly incorrect. but she's proving the triangles are congruent by SAS, in which case, she does not need line 4 (even though the calculations there are correct).

Answer 20

I see your point!!~~
line 4 :|

Answer 21

well... let's go democratically then... majority rules...

Answer 22

but if it is correct, the proof is wrong too,because the angle dont lie between two sides

Answer 23

He/she should find FD instead of DE in this case :|

Answer 24

yes

Answer 25

yep..

Answer 26

Then, it's the problem of line 4... :|

Answer 27

no line 6 the conclusion is wrong

Answer 28

that was a good point..

Answer 29

No such an option lol

Answer 30

zero for her lol

Answer 31

didn't mean that...

Answer 32

Line 4 is the FIRST one wrong because she should have measured DF, and not DE. so anything after it is irrelevant. So the answer it Line 4 is wrong.

Answer 33

now there's no majority... i think it's split even between line 4 and line 5

Answer 34

line four it's not wrong it's correct but will not give the answ

Answer 35

I am so lost, guys. Hahaha.

Answer 36

So, it's incorrect, but it's not TECHNICALLY incorrect?

Answer 37

its wrong because you measure the wrong thing. that's like adding 4+5, when you are suppose to add 4+9. the problem is wrong which makes the conclusion wrong.

Answer 38

it's incorrect for the purpose of the proof but technically it's correct... even though it's NOT needed.

Answer 39

the calculations are correct, but the measurements are wrong. which makes the whole problem in line 4, wrong.

Answer 40

agree ^^^

Answer 41

but we got 2-3 other people against us... show 'em your muscles... that'll scare 'em to choose line 4...

Answer 42

line 5
if line 4 is wrong then line 3 must be wrong

Answer 43

Why must line 3 be wrong?

Answer 44

line 3 is correct and is needed for SAS

Answer 45

AB is not needed

Answer 46

we already know that line 5 is wrong. but it asked which is FIRST one that's wrong. AB is needed to compare to DF, but she tried to compare it to DE, which is were she made her error, LINE 4.

Answer 47

agree ^^^ (i'm not that vocal)

Answer 48

show 'em your muscles too.

Answer 49

I have a feeling this is a trick question that shouldn't be asked on 10th grade Geometry worksheets.

Answer 50

the question wasn't even clear at the beginning

Answer 51

Basically it really didn't matter which side chose but as long as she compared the right one. Otherwise, its irreverent. Either way, the first one is wrong is line 4.

Answer 52

give us your teacher's email...

Answer 53

s=1+2+...
s+1=1+1+2+3+...
->(s+1/s)=1-> s+1=s->0=1

Answer 54

what's that go to do with the problem?

Answer 55

same thing the line 2 and three are correct but the 3 is wrong

Answer 56

1 and 2 my bad

Answer 57

are you confuse yet @Ashley10116 , ??? :)

Answer 58

Oh, I've been confused. Haha.

Answer 59

and we call ourselves tutors....

Answer 60

Hahaha, it's not your fault. It's this stupid question. :(

Answer 61

toss a coin.. heads 4 , tails 5 :)

Answer 62

it's line 4.

Answer 63

:S
The democratic way fails?
Line 4~~~

Answer 64

yay!! 3-2

Answer 65

LINE 4, DANGGONE.

Answer 66

heheh....

Answer 67

not democratic... i think her teacher is north korean...

Answer 68

i think there should have been a question asking what to do at the beginning

Answer 69

Gonna close this question, guys. Gotta ask some more. Help on those is appreciated. Thanks for the help!!

Answer 70

aloha...