Define arithmetic sequence

Δabc is located at a (2, 0), b (4, 4), and c (6, 3). zackery says that δabc is an isosceles triangle, while verna says that it is a right triangle. who is correct? a. zackery, because segment bc ≅ segment ac b. zackery, because segment ab ≅ segment bc c. verna, because segment bc is perpendicular to segment ac d. verna, because segment ab is perpendicular to segment bc