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05 A triangle can be drawn by connecting three of the dots shown below.
Each dot is a vertex of a triangle. How many dif ferent triangles can you
draw such that the numbers of each triangle’s three vertices add up to 15?
1 23
4 56
789
52 NUMINO Challenge A1
Each dot is a vertex of a triangle. How many dif ferent triangles can you
draw such that the numbers of each triangle’s three vertices add up to 15?
1 23
4 56
789
52 NUMINO Challenge A1
