Question

. Find the perimeter of to the right with vertices A(-3,1), B (-1,3) and C(3,1)? Show your work.

Answer 1

of "rectangle ABC" to

Answer 2

Why do you keep reposting this question?

Answer 3

no this one is different actually

Answer 4

no it's not!

Answer 5

What information would you need to find the perimeter of to the right with vertices A(-3,1), B (-1,3) and C(3,1)? yes it is.

Answer 6

that's the exact same question you've posted 6 times now. I'm looking at your list of posted questions.

Answer 7

whatever

Answer 8

go back to the one where we were working before you decided to take a 20 minute break or whatever. you weren't done.

Answer 9

and i asked if it was 12 and you never answered back

Answer 10

if you look, you'll see that I did.

Answer 11

well you didnt on my screen

Answer 12

go back and look. http://openstudy.com/study#/updates/51dc2a4ce4b0d9a104d9ce4c

Answer 13

i did what you told me to do

Answer 14

you didn't answer my question, and you didn't get the right answer.
is 12 supposed to be the length of the final side of the triangle, or is it the perimeter? either way, it's wrong. do you want to find your mistake, or argue?

Answer 15

well if you stop being impatient with me

Answer 16

impatient? I've been working on this with you for over 2 hours, on and off. all I ask is that you do what I ask you to do.

Answer 17

and i am

Answer 18

no. I frequently ask you questions which you never answer.

again: "is 12 supposed to be the length of the final side of the triangle, or is it the perimeter?"

Answer 19

you said they were wrong!

Answer 20

yes, they are wrong, but it still matters which part of the problem you were trying to answer! we need to find out WHY you got the wrong answer.

Answer 21

so, again, just do as I ask, instead of arguing.

Answer 22

and i dont know how i got the wrong answer okay

Answer 23

which part of the problem were you trying to answer? was that the sum of the sides, or the length of the final side?

Answer 24

okay, whatever. find the length of the side going from C to A on your diagram. all you have to do is count the marks on the grid between C and A.

Answer 25

6

Answer 26

right!

now, add 6 + the two other sides we found. that's your perimeter.

Answer 27

and thats how i got 12 6+4+2=12

Answer 28

the other sides were not 4 and 2.

Answer 29

they were \(2\sqrt{2} \approx 2.818\) and \(2\sqrt{5} \approx 4.472\)

Answer 30

13.29

Answer 31

yes, or \(6 + 2\sqrt{2} + 2\sqrt{5}\) if your system prefers a symbolic or exact answer.

Answer 32

i just need to find the perimeter so whatever works

Answer 33

whatever works is what your computer classroom software expects. I don't know what that is.

Answer 34

13.29 is an approximation of \(6+2\sqrt{2}+2\sqrt{5}\)

Answer 35

13.30 is a better approximation.

Answer 36

ok now i need to find the area shall do in here still or shall i ask as another question?

Answer 37

we can do it here. area of a triangle is given by\[A = \frac{1}{2}bh\]

\(b\) is the length of the line across the bottom from A to C (or C to A, if you prefer). You already found that, do you remember the value?

Answer 38

no

Answer 39

well, then figure it out again....

Answer 40

6?

Answer 41

yes! :-)

Answer 42

okay, now we need to find \(h\) which is the height of the triangle. You figured this out before, too. It's the distance from point B down to the line running between A and C.

Answer 43

2

Answer 44

okay, you know the formula, you know b, you know h, what's the area?

Answer 45

its 1/2 x 6 x 2?

Answer 46

yes

Answer 47

then it is 6

Answer 48

yes!

Answer 49

you can eyeball the diagram and count squares to check the answer...

Answer 50

there are three complete squares, plus two half squares under the line from A to B, plus 4 more half squares under the line from B to C

3 + 2(1/2) + 4(1/2) = 3 + 1 + 2 = 6

Answer 51

ok im done for today