Number 6 is 10:10 The first plane arrives at 6:50 you add 50 minutes to that and keep adding 50 minutes until you get to after 10:00 because it says his plane arrived after 10:00.
3/4. triangle FHE and triangle KMN; triangle GEH and triangle LNM
1 - 113 degrees
2 - 67 degrees
3 - 67 degrees
4 - 113 degrees
Hope this helped :)
