The line l1 l_1\,l1 passes through the points P(−1,2)P(-1, 2)P(−1,2) and Q(11,8)Q(11, 8)Q(11,8).
Find an equation for l1 l_1\,l1 in the form y=mx+cy = mx + cy=mx+c, where m m\,m and c c\,c are constants.
The line l2 l_2\,l2 passes through the point R(10,0)R(10, 0)R(10,0) and is perpendicular to l1l_1l1. The lines l1 l_1\,l1 and l2 l_2\,l2 intersect at the point SSS. Calculate the coordinates of SSS.
Show that the length of RS RS\,RS is 353\sqrt{5}35.
Hence, or otherwise, find the exact area of triangle PQRPQRPQR.
Practise Edexcel A Level Old Maths Coordinate Geometry with exam-style questions for A Level Old Maths. 6 questions, matched to the Edexcel A Level Old Maths (9371) specification and written in Unit exams C1, C2, C3 and C4 plus two applied units (e.g. S1 and M1) style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.