Using q2 if the scale factor is 2.5 then the perimeter of the image ? *
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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?

The reflexive property of congruence lets you say that ∠pqr ≅

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?