Geometry

Determine whether triangle DEF is congruent to triangle PQR given the coordinates of the vertices. Explain.
D(-6,1) E(1,2) F(-1,-4) P(0,5) Q(7,6) R(5,0)

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1. If a triangle given by the matrix is dilated by a scale factor of 2, what will happen to the side lengths and angle measures of the triangle?

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