OCR MEI C4 2011 January — Question 4

Exam BoardOCR MEI
ModuleC4 (Core Mathematics 4)
Year2011
SessionJanuary
TopicVectors 3D & Lines
4 The points A , B and C have coordinates \(( 2,0 , - 1 ) , ( 4,3 , - 6 )\) and \(( 9,3 , - 4 )\) respectively.
  1. Show that AB is perpendicular to BC .
  2. Find the area of triangle ABC .
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