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  1. 1 2 3 4 5 6
  2. 3 7 8 9 10 11 Lock units together
  3. 12 Make 30 units and 13 Top view when you join 3 units in each point cut 1 cm off the top 14 Each half of each unit is joined to 2 other units The other half is joined to 2 more units The central points on one side of the joined units all meet in one point Together five units form a pentagon The shaded areas are part of the adjacent pentagons
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