Thales Practice 5

In the circle shown below, line AB is the diameter of the circle with the center C.
The measure of ∠ [i]BCE = ______°[/i]
The measure of ∠ DCA[i] = ______°[/i]
The measure of ∠ ACE = ______°
The measure of ∠ DCB[i] = ______°[/i]
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Information: Thales Practice 5