What is the number of triangles that can be formed whose vertices are the vertices of an octagon but have only one side common with that of octagon?

  1. 64
  2. 32
  3. 24
  4. 16

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For one vertex 4triangles ...end triangles against the condition

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Mechanical Engineer by education, Entrepreneur by heart. Day by day nothing is changing but when we look behind, everything is different.

So, you take one side at a time and draw all the possible triangles with that side. Each side will give a maximum of 4 triangles. Octagon has 8 sides, so 8 x 4 = 32. Bingo!

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Mechanical Engineer by education, Entrepreneur by heart. Day by day nothing is changing but when we look behind, everything is different.

Well Manu, I think that is correct. But let us have how you will get to this answer?

 

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