If you need help on the first proof, click here!
For the third proof, followed by the second proof, click here!
Find the value of x.
Hint: https://tinyurl.com/CPG-1-3-LT4-Hint-1
If \angle{1}\cong\angle{8}, which lines (if any) can you conclude are parallel?
If \angle{8}\cong\angle{6}, which lines (if any) can you conclude are parallel?
If \angle{11}\cong\angle{7}, which lines (if any) can you conclude are parallel?
If \angle{5}\cong\angle{10}, which lines (if any) can you conclude are parallel?