In the diagram below, you will see a reflection of segment DE followed by another reflection. You will be able to move the preimage (Segment DE), and the parallel lines (line f and g). You are given lengths of segments connecting preimages to their images. You may slightly drag the lengths if they seem to get in the way.
What transformation maps segment DE to segment D"E"?
What segment is congruent to segment DF?
Find the lengths of DD" and EE" (add up the given lengths). What do you notice?
Name the transformation that maps segment QR to segment Q"R".
Name a segment congruent to segment QD.
Name a segment congruent to segment R'F.