Question

Triangle abc has vertices A (4,3) B(1,4) and c (2,1) . What are the vertices of the image after the reflection across the line y=-1

Answer 1

A'(4,-5), B'(1,-6), C'(2,-3)

Explanation:

Reflect across the line y = -1 to get these points. You can count how many points it takes to get to that line and then add the same amount of points to the other side.