$ΔXYZ$ was reflected across $\overline{XZ}$, as shown at right.  

1. How can you justify that the points $Y$, $Z$, and $Y'$ all lie on a straight line?

   Hint (a):

   $m∠YZX=90º$

2. What is the relationship between $ΔXYZ$ and $ΔXY'Z$? Why?

   Hint (b):

   Remember that reflections do not change the size or shape of a figure.

3. Read the Math Notes box for this lesson. Then make all the statements you can about the corresponding parts of these two triangles.

   Hint (c):

   Altogether, you should be able to make six statements.
   Be sure to make them for all corresponding angles and sides.