Problema Solution
∆ABC is reflected about the line y = -x to give ∆A'B'C' with vertices
A'(-1, 1), B'(-2, -1), C(-1, 0). What are the vertices of ∆ABC?
Answer provided by our tutors
A(-1, -(-1)) = A(-1, 1)
B(-(-1), -(-2)) = B(1, 2)
C(-0, -(-1)) = C(0, 1)