Polygons on a Coordinate Grid_DBA Assignment

State if the two triangles are congruent. if they are, state how you know?

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?