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 . 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.

[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)



therefore, X = x1+x2 divided by 2

Y = y1+y2 divided by 2

Apply this formula to ur problem.... u'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.

well, i didn't wanna be the first, so i waited...

[bigboab]

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

[Illuminati]

The formula to find a midpoint of a line (in relation to the algebra you'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'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