The coordinates of the vertices of triangles are listed in the options below. Which is a right triangle?
D(−2, −3), E(−5, −7), F(6, −7)
A(−3, 2), B(−4, −9), C(8, 1)
P(−6, 2), Q(1, 0), R(−3, −2)
X(3, 1), Y(−4, −3), Z(−8, 3)
+30 
