What is the answer to this?

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?

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Give me the equations of two lines that have the same slope but are not parallel.