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Spot the wrong piece in each rule

Exercise and reference answers

Questions
  1. Statement parts
    1. A cross B
    2. equals
    3. plus
    4. B cross A
    Correction
    minus
    Incorrect part
    plus
  2. Statement parts
    1. A dot B
    2. at ninety degrees
    3. equals
    4. AB
    Correction
    zero
    Incorrect part
    AB
  3. Statement parts
    1. A minus B
    2. means
    3. A
    4. plus
    5. B
    Correction
    negative B
    Incorrect part
    B
  4. Statement parts
    1. Projection of A on B
    2. is
    3. A dot B
    4. over
    5. size of A
    Correction
    size of B
    Incorrect part
    size of A
Instructions
Each line states a rule about vectors with one piece wrong. Tap the piece that is wrong.

Explanation

_Source: Qallery verified question bank, AAI Junior Executive Air Traffic Control, topic Vectors & 3D Geometry_
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