Video Transcript
Fill in the blank. If line 𝐴𝐵 is parallel to
line 𝐶𝐷 and line 𝐴𝐵 is parallel to line 𝐸𝐹, then line 𝐶𝐷 is what to line
𝐸𝐹.
We first recall that if two
lines are parallel to the same line, then they must be parallel. Since both lines 𝐶𝐷 and 𝐸𝐹
are parallel to the same line, 𝐴𝐵, we must have that the two lines are
parallel. Hence, the answer is that line
𝐶𝐷 is parallel to line 𝐸𝐹, denoted as shown.
