Question
Which of the following ways is incorrect to work out the total number of triangles? Give the answer in letter. (Eg a)
  1. 2 x 5 
  2. 2 + 2 + 2 + 2 
  3. 5 x 2
  4. 5 + 5
2 m

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Which of the following ways is incorrect to work out the total number of triangles? Give the answer in letter. (Eg a)
  1. 2 x 5 
  2. 2 + 2 + 2 + 2 
  3. 5 x 2
  4. 5 + 5