Answer:
96°
Step-by-step explanation:
The measure of arc EC is twice the measure of ∠DEC, so is ...
arc EC = 2×68° = 136°
The measure of arc BC is found from the sum of arcs around a circle.
BC +CE +EB = 360° = BC +136° +128°
BC = 96° . . . . . subtract 264°
no
The answer is 150, because 300 / 3 = 100, and 100 + 150 = 150.
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