Question

Could you please help?

Answer 1

52 degrees (which agrees with the last answer option).

Explanation:

You need to subtract from 90 degrees (the measure of the larger angle < DCF) the measure of angle <ECF (which is 38) to find the measure of the angle that is left <DCE:

< DCE = 90 - 38 = 52 degrees (which agrees with the last answer option).