9. The coordinates of the endpoints of segments
are given below. Are the two line segments
parallel, perpendicular, or neither? Justify
your answer.
a) S(-4, -1), T(-1,5) and U(1, 1), V(5, -1)
b) B(-6, -2), C(-3,3) and D(2,0), E(5,5)
c) N(-6,2), P(-3,-4) and Q(1, -3), R(3, 4)
d) G(-2,5), H(4,1) and J(1, -4), K(7,0)

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.