Label each pair of triangles with the postulate or theorem that proves the triangles are congruent.

We can conclude that Δ ABC ≅ Δ DEF by SSS postulate.

Step-by-step explanation:

Δ ABC and Δ DEF are congruents because:

1. Their sides AB and DE are equal (9 units = 9 units)

2. Their sides BC and EF are equal (5 units = 5 units)

3. Their sides AC and DF are equal (10 units = 10 units)

Now, we can conclude that Δ ABC ≅ Δ DEF by SSS postulate.

Step-by-step explanation:

Given

Reflection:

Required

Determine the new coordinates of A

For reflection, the new coordinate will be:

So, for

A' will be: