cetroid finder

[Jimbo 420]

this program is suposed to find the centroid of a triangle i can get 2 line eqasions but can't get it to find the centroid need help

[upthescale]

are you asking for help? go the the main menu, and go in Turing Help, and post this same post there, because this is users submisions, not help quesitons!

[Delos]

Moved.
And Jimbo 420, please change your sig. Statements promoting negative stereotypes, racism, or any other form of discriminatory thought are not tolerated. Even in a humorous form. I'm sure you did not mean any harm by it, but it still is really pushing the envelope.

[upthescale]

how is that sterotype delos?

[Clayton]

^the above post is spam^ you have been warned too many times to count and it is really annoying plz stop, it is a stereotype because it is using Jews (joo) as a point of humour (and improperly i might add)

[Jimbo 420]

any1 know how to finish this program it gives the 2 lines and the 2 lines must be solved to find the answer

[TheOneTrueGod]

Theres two methods.

A) Substitution

L1: 2X + 4Y = 6
L2: 3X - 6Y = 12

from L1: X = (6-4Y)/2
X = 3 - 2Y

sub into L2:

3(3-2Y) - 6Y = 12
9 - 6Y - 6Y = 12
-6Y = 3
Y = -1/2

Sub back into the L1 eqn
2X + 4(-1/2) = 6
2X - 2 = 6
2X = 8
X = 4

so the point of intersection is (4,-1/2)

B)Add the equations
L1: X + 3Y = 5
L2: X - 4Y = 3

L1 - L2 : X-X + 3Y - (-4Y) = 5 - 3
3Y + 4Y = 2
7Y = 2
Y = 2/7

Now continue by subbing it in to the equations.



Summary

You'd probably be better off using the first method, though you'd have to be specific as to the input.

[Jimbo 420]

yeh i had something like that going on thanks for the help tho im pretty sure it works good now thanks man

[Jimbo 420]

ok i can't seem to figure out how to code the substitution equasions? would it work easier using a procedure(which i havent used many of:|)