Mathematics, 10.02.2020 23:57 joco3625

The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. How many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?

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The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit a...