From Paper 2: Pure Mathematics 2
26 marks
The points P, Q and R have coordinates (1, 2, 3), (4, -2, 3) and (1, 2, -9).
(a) Find |PQ⃗| and |PR⃗|.
(b) Show that angle QPR is a right angle and find the area of triangle PQR.
This paper is written by Plasmo in the style of the Edexcel A-Level Maths exam. It is not a past paper and is not produced or endorsed by the exam board.