Answer:
90 degrees
Step-by-step explanation:
We know that the triangle with ABC is equal to 180 degrees total. Based on this, you would subtract 60 and 90 (right triangle and the C angle) from 180 to find B, which is 30. Knowing that the Angle of B and ECD are equal, you now know the two angles that add up to 180 with the angle you are searching for. This means that all you have left to do is subtract 30 and 60 from 180, and you are left with 90 for the solution to BCE.
