The coordinates of the vertices of △rst are r(−3,1), s(−1,4), and t(3,1) . which statement correctly describes whether △rst is a right triangle? △rst is a right triangle because rs¯¯ is perpendicular to rt¯¯ . △rst is a right triangle because rs¯¯ is perpendicular to st¯¯ . △rst is a right triangle because st¯¯ is perpendicular to rt¯¯. △rst is not a right triangle because no two of its sides are perpendicular.