MP0149: Add 9 to have 18 Triangles

   January 17, 2021  Leave a Comment on MP0149: Add 9 to have 18 Triangles  Posted in Matchstick, Matchstick - Triangular

We use 15 matches to create 7 triangles (5 small 2 medium).

Can you add 9 more matches so that there are 18 triangles in total?

Author: admin

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