Based on the inscribed angle theorem, the value of x is: 126°.
What is the Inscribed Angle Theorem?
The inscribed angle theorem states that, the measure of inscribed angle (63 degrees) equals half of the measure of central angle (x).
Thus, we would have:
63 = 1/2(x)
2(63) = x
126 = x
x = 126°
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