Triangle abc with vertices a(4, -6), b(2, -8), and c(-10, 4) is dilated by a scale factor of 2 to obtain triangle a'b'c which statement best describes triangle a'b'c it is similar to triangle abc and has coordinates a'(2,-3), b'(1,-4), and c'(-5, 2). it is similar to triangle abc and has coordinates a'(8,-12). b'(4, -16), and c'(-20, 8). it is congruent to triangle abc and has coordinates a'(2, -3), b'(1,-4), and c'(-5, 2). it is congruent to triangle abc and has coordinates a'(8, -12), b'(4,-16), and c'(-20, 8).