Did similar triangles and vector crap like this a long tym ago, so culdnt solve it for my brother. So Paulie please help. I am writing down the question and then attaching the picture
In the figure, the lines ST, PQ and OR are paralle. OPS, OQT and RQS are straight line and OR= 3a OP= b and PS=2b and OQ= 2a+b . The underlined letters are all vectors.
Express in terms of a and b
(a) (i) PQ (ii) QR (iii) QT (iv) ST I did find (a) (i) and (a) (iii) but not the rest
(b) (i) the area of triangle OPQ / area of triangle SPQ
(ii) the area of triangle OPQ / area of triangle OST
(iii) the area of triangle OPQ / area of triangle ORQ
And the answers are:
(a) (i) 2a (ii) a-b (iii) 4a+2b (iv) 6a
(b) (i) 1/2 (ii) 1/9 (iii2/3)
