Geometry...

[imported_Catracho]

I dont understand how to do this crap! and i dont understand the book. Can someone please explain how do do this.

Y is the midpoint of XZ. For each pair of points given, find the coordinate of the third point.
X(5,5), Z(-1,5)

Can anyone please explain how to do this? <_<
Any help will be appreciated

[4play]

im guessing it is y(2,5)

[imported_Catracho]

How did u get to that answerd :huh: . Please explain how so i can do the rest. Thanks

[4play]

it is the differnce between the two x or y number divided by 2 and then subtract this number off the largest so :

5 + (-1) = 6 note: the -1 gets counted as a positive

6/2 = 3 divided by 2

5 - 3 = 2 that is the midpoint of the two x numbers.

hope that helped that probably aint the best way to do it but hey it works for me.

[nikita69]

man o man. this takes me back years. :)

[4play]

man o man. this takes me back years.

same here but i still looked at it an though erm how do i do this again since it has been that long. :lol:

[ashutosh_cool16]

Its a simple formula to find out the coordinates of midpoint... Its called the midpoint formula in co-ordinate geometry.


The formula is -

If Y is the Midpt of X (x1,y1) and Z(x2,y2) ,

Assume coordinates of Y to be (X,Y)

http://www.piczonline.com/client/ashutosh_cool85/midpoint.jpg

therefore, X = x1+x2 divided by 2

Y = y1+y2 divided by 2

Apply this formula to ur problem.... u&#39;ll get the answer.

[nikita69]

Originally posted by 4play@23 September 2003 - 09:20

man o man. this takes me back years.

same here but i still looked at it an though erm how do i do this again since it has been that long. :lol:
well, i didn&#39;t wanna be the first, so i waited... :lol: :lol: :lol:

[bigboab]

At what point were you going to intervene Niki? Formula please. :P

[Illuminati]

The formula to find a midpoint of a line (in relation to the algebra you&#39;ve given us) is
Co-ordinates of Y = ([X of X + X of Z, all / by 2] , [Y of X + Z of X, all / by 2])

So in the example you gave us
Co-ords of Y = ([5 + -1 /2] , [5 + 5 /2]
= ([4/2], [10/2])
= (2, 5)
so the co-ords of Y are (2, 5)

Sorry if that seems a little confusing (Invision Power Boards aren&#39;t really designed for formula writing), but compare this topic with a textbook with the proper form of the equation in and you should do fine :)

[james_bond_rulez]

Originally posted by 4play@23 September 2003 - 03:07
5 + (-1) = 6 note: the -1 gets counted as a positive

I see you didn&#39;t pass math...

5 + (-1) = 5 - 1 = 4, not 6

4/2=2, this is the x value

5 +5 = 10
10/2 = 5, this is the y value

it&#39;s very simple, you are trying to find the midpoint of 2 points. it&#39;s in fact finding the average between 2 numbers. and it&#39;s the sum divided by how many numbers you&#39;ve added together.

[Billy_Dean]

Catracho, don&#39;t they have the answers in the back of the book? That&#39;s the easiest way&#33;



:)

[james_bond_rulez]

sometimes textbooks only have odd numbered answers or even numbered answers in the back of the book.

damn book dealers trying to weasel out of the job...

and also I hate it when they only print out the answers only and dont show you how the work is done. so you have to go out and buy books that show you the work step by step.

that&#39;s what happened to me in my first year of calculus. the entire work book full of answer but they dont tell you how it&#39;s done. how are we supposed to learn?