On a compass, due east is a 1/4 turn clockwise from due north. how many degrees are in a 1/4 turn?

I’m stuck on this i don’t understand.

In the given triangle, ∠aed ∼ ∠ abc, ad = 6.9, ae = 7.2, de = 5.2, and bc = 10.2. find the measure of bd and ce. round your answer to the nearest tenth.

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*