Question

∆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?

A(1, -1), B(-1, -2), C(0, -1)
A(-1, 1), B(1, 2), C(0, 1)
A(-1, -1), B(-2, -1), C(-1, 0)
A(1, 1), B(2, -1), C(1, 0)
A(1, 2), B(-1, 1), C(0, 1)

Answer 1

In the image.

Hope this helps!

Explanation:

Answer 2

A(-1,1),B(1,2),C(0,1) is the correct answer
As we know that
when y = -x or x = -y
P(x,y) = P'(-y,-x)