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# Vectors in a triangle watch

1. So i have a triangle with the values:OA= a OB = bAB= -a+b The point B devides AB and BC in the ratio 2:3 Work out vector OC in terms of a and b simplify your answer
2. (Original post by Juan55613)
So i have a triangle with the values:OA= a OB = bAB= -a+b The point B devides AB and BC in the ratio 2:3 Work out vector OC in terms of a and b simplify your answer
Is it possible to send a pic of the triangle with the corners labelled?
3. Is this mathswatch lmao? All my friends are sending me this question :/

Anyways my solution:

Given AB = 2/5 AC & AB = b-a

It follows that AC = 2.5b-2.5a (by simple algebra)

So OC = OA + AC = a + 2.5b-2.5a = 2.5b-1.5a.
4. (Original post by thekidwhogames)
Is this mathswatch lmao? All my friends are sending me this question :/

Anyways my solution:

Given AB = 2/5 AC & AB = b-a

It follows that AC = 2.5b-2.5a (by simple algebra)

So OC = OA + AC = a + 2.5b-2.5a = 2.5b-1.5a.
thank you, i was trying to use a different approach by trying to go from OB+BC to get to OC, but this method seems more simple and understandable
5. (Original post by Juan55613)
thank you, i was trying to use a different approach by trying to go from OB+BC to get to OC, but this method seems more simple and understandable
Np, you in year 11?
6. (Original post by thekidwhogames)
Np, you in year 11?
yeah, I am

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