On a coordinate plane, triangle a b c has points (negative 9, 3), (negative 9, 6), (0, 3) and triangle a double-prime b double-prime c double-prime has points (3, negative 1), (3, negative 2), and (0, negative 1). which transformations could be performed to show that △abc is similar to △a"b"c"? a reflection over the x-axis, then a dilation by a scale factor of 3 a reflection over the x-axis, then a dilation by a scale factor of one-third a 180° rotation about the origin, then a dilation by a scale factor of 3 a 180° rotation about the origin, then a dilation by a scale factor of one-third