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3.5 Perpendicular bisectorsIB Maths: Applications and Interpretation HL: Mind map

What this mind map covers

  • Midpoint and gradient
  • Perpendicular gradient
  • Finding the bisector
  • Given line and midpoint
  • Applications
  • Common mistakes

Exam questions on 3.5 Perpendicular bisectors

  1. Points A(2,1)A(2,1) and B(8,5)B(8,5) are given.
    Find the equation of the perpendicular bisector of [AB][AB], giving your answer in the form ax+by=dax+by=d where aa, bb and dd are integers.2 marks
  2. Points P(−3,7)P(-3,7) and Q(5,3)Q(5,3) are given.
    Find the equation of the perpendicular bisector of [PQ][PQ], giving your answer in the form y=mx+cy=mx+c.2 marks
  3. The line segment [CD][CD] lies on the line 3x−4y=103x-4y=10. The midpoint of [CD][CD] is M(6,2)M(6,2).
    Find the equation of the perpendicular bisector of [CD][CD], giving your answer in the form ax+by=dax+by=d where aa, bb and dd are integers.3 marks
See the full worksheet

Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).