△abc has interior angles with measures x°, 90°, and 70°, and △def has interior angles with measures y°, 70°, and 20°. using the given information, which statement is true? a the triangles are similar because they each have an interior angle with a measure 70°. b the two triangles are not similar because the interior angles are congruent but the side lengths are different. c the two triangles are similar because y=90 . d the two triangles are not similar because x≠y .