Given A(2,3) B(8,7) and C (6,1) which coordinate will make AB perpendicular to CD?

A. D(3,3)
B. D(4,4)
C. D(8,4)
D. D(9,3)

Detailed answer would be great!!

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex

Which of the following represents the factorization of the trinomial below? x^2+7x-30

Proving the congruent supplements theorem