Question

Triangles 1 and 2 can be shown to be congruent using the reflection
A) (x, y) → (-x, -y).
B) (x, y) → (-x, y).
C) (x, y) → (-y, x).
D) (x, y) → (y, x).

Answer 1

i'm assuming it's A but im not sure

Answer 2

Here is a good way to think about it, the height of the point stays the same but the its position is different. The height is y but its left and right position is x. This should be able to help you think about it.

Answer 3

so B then