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Spot the one that does not belong

Exercise and reference answers

Questions
  1. Items
    1. Perpendicular
    2. Equal slopes
    3. Parallel
    Odd item
    Perpendicular
  2. Items
    1. Slope zero
    2. Vertical
    3. Horizontal
    Odd item
    Vertical
  3. Items
    1. Slope AB
    2. Slope BC
    3. tan α
    Odd item
    tan α

Explanation

Grouped by which test each belongs to. Source: syllabus Maths, Ch 9 Straight Lines.
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