Question

ΔABC has the vertices A(0, 0), B(-8.5, 3), and C(0, 6), and ΔAXY has the vertices A(0, 0), X(-3, -8.5), and Y(-6, 0). Which transformation can be used on ΔABC to show that ΔABC is congruent to ΔAXY?

Answer 1

Rotation of ∆ABC counterclockwise about the origin by 90° will transform it to ∆AXY.
(x, y) ⇒ (-y, x)