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# Straight Line Questions? watch

1. I was just going over one of the revision exercises from the Straight Lines topic and I came across this question:

The equations of the sides of triangle PQR are PQ: 4y - x = 11, QR: y - x = 1 and PR: y + 2x = -4. Find the co-ordinates of P, Q and R.

Also, if you are asked to prove lines are concurrent would you just carry out simultaneous equations to prove they all meet at the same point?

And could someone explain the idea of angle bisectors when referring to concurrent lines in a triangle? I came across a question on it but there is no mentioning of angle bisectors in the notes; only of concurrent medians/altitudes/perpendicular bisectors.
2. bump
3. (Original post by Diiiii)
bump
For the original question you solve the simultaneous equations in pairs

Eg

PQ and QR will solve to give Q

Could you post an exam question relation to your other issues, and what exam board you are doing

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