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Mathematics 21 Online
OpenStudy (anonymous):

I just need help with this whole thing... I need explanation not just answers.

OpenStudy (anonymous):

OpenStudy (anonymous):

Where are the vertices of the parallelogram listed?

OpenStudy (anonymous):

oh my bad...here's the graph and the vertices.

OpenStudy (anonymous):

Each side of the parallelogram has two coordinate points associated it. Do you know the formula y=mx+b?

OpenStudy (anonymous):

yea thts the slope-intercept form.

OpenStudy (across):

I commend you! This is the best question I've seen in OS in a very, very long time!

OpenStudy (anonymous):

Yep so if we looked at the side AB where A(0,3) and B(3,0) would you know how to calculate the slope m?

OpenStudy (anonymous):

lol thnk you? @across

OpenStudy (anonymous):

yea nd i have those in already in the beginning of the assignment.

OpenStudy (anonymous):

Oh...ok that makes sense. So you are needing help on part b?

OpenStudy (anonymous):

yea i need help on part b and c....also for question 2 prt b and c.

OpenStudy (anonymous):

ok check this attachment...do you know the pythagorean formula?

OpenStudy (anonymous):

yea a2+b2=c2 right?

OpenStudy (anonymous):

Yes, so when we look at the side AB that is actually the hypotenuse of our triangle. Do you understand how I made that triangle?

OpenStudy (anonymous):

okay so then wuld we do the special right triangle formula?

OpenStudy (anonymous):

Well if you mean the pythagorean formula; then yes.

OpenStudy (anonymous):

yea thts wat i meant. so then it will be 18?

OpenStudy (anonymous):

Well remember the "c" in the formula is squared so you have to take the square root of that.

OpenStudy (anonymous):

It's like 4.24.... sumthin sumthin

OpenStudy (anonymous):

Yep

OpenStudy (anonymous):

so wat does this have to do with the assignment?

OpenStudy (anonymous):

here's another visual

OpenStudy (anonymous):

well part b was finding the length of the sides, and that is what you have just found

OpenStudy (anonymous):

okay so now i just use the Pythagorean theorem nd it'll give me my lengths?

OpenStudy (anonymous):

yes, but if you look a picture of the parallelogram you will notice all the sides are the same

OpenStudy (anonymous):

the diagonal lengths can be found by inspection, but it usually doesn't work out that way

OpenStudy (anonymous):

okay so let me see if i got this.... all of part b answers is 4.24...?

OpenStudy (anonymous):

No, all of the exterior sides are that answer. The diagonals are a different length.

OpenStudy (anonymous):

okay so how do we figure out the lengths.

OpenStudy (anonymous):

look at this picture...the blue lines are the diagonal lengths.

OpenStudy (anonymous):

okay...

OpenStudy (anonymous):

How long are those lines?

OpenStudy (anonymous):

3?

OpenStudy (anonymous):

No, count how my squares on the graph are between A and C

OpenStudy (anonymous):

4?

OpenStudy (anonymous):

if ur countin the halfs 5?

OpenStudy (anonymous):

oh ohld on is it 7?

OpenStudy (anonymous):

wait is it 9?

OpenStudy (anonymous):

Yeah it's 9

OpenStudy (anonymous):

Acutally, hold on...I think it's 71

OpenStudy (anonymous):

71! how did u get tht?

OpenStudy (anonymous):

It's 6 dude.

OpenStudy (anonymous):

C. the parallelogram is a square D. the perimeter is four times the length of the sides E. Area is 18

OpenStudy (anonymous):

oh okay..r u gettin mad at me?

OpenStudy (anonymous):

Oh no...i would never. I just feel like your not taking the time to look at the picture.

OpenStudy (anonymous):

i did it's just i dnt get the whole proofs thing it's very hard to me idk why it's like i get every thing else but this is my weakness

OpenStudy (anonymous):

Ok so are you seeing generally where I got the diagonal lengths from? Or do you need a better example?

OpenStudy (anonymous):

is tht an o or a d?

OpenStudy (anonymous):

srry... that is an "o" for origin

OpenStudy (anonymous):

I think i get it but if u wuldn't mind i culd use one more example. it's aight man

OpenStudy (anonymous):

u know wat i think i got it u dnt need to give me another example...man thnks a lot u reallly helped me understand it better

OpenStudy (anonymous):

alright find the length of the side AB of the parallelogram

OpenStudy (anonymous):

remember....make a right triangle with the side you are trying to find as the hypotenuse

OpenStudy (anonymous):

yea nd i did tht so now i have to use the pt?

OpenStudy (anonymous):

yep

OpenStudy (anonymous):

so is this how the triangle wuld look?

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