The coordinates of the vertices of triangle ABC are A(1, 2) , B(- 5, 3) , and C(- 6, - 3) . Prove that triangle ABC is isosceles. State the coordinates of point D such that quadrilateral ABCD is a square. Prove that your quadrilateral ABCD is a square.

Complete each statement from the information given and the triangle criterion you used. if the triangles cannot be shown to be congruent, leave the box for the second triangle blank and choose for reason “cannot be determined.” carbon - regular hexagon. ∆can ≅ ∆ by