Question

1. Triangle ABC with coordinates A(12, -3), B(12, 3) and C(-1, -1) is reflected across

the line Y=3. What are the new coordinates?

Answer 1

A'(12,9), B'(12,3), C'(-1,5)

Explanation:

A is 6 units from the line y=3, so it will map to be 6 units away on the other side of y=3, to the point (12, 9).

Similarly, B' has coordinates (12,3) and C' has coordinates (-1, 5)