What theorem can be used to prove these triangles are congruent?

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

If the perimeter of the square equals the perimeter of the regular pentagon. each side of a pentagon is 16cm long. how long is each side of the square?

Suppose your sat score is 2040. a college with an average sat score for admintted students of which of these would most likely be your best option?