Answer:
84°
Explanation:
You want the measure of angle x formed by a tangent and a chord that cuts off an arc of 168°.
Angle
The measure of angle x is half the measure of the subtended arc, as it is with all inscribed angles in a circle.
x = 168°/2 = 84°
The value of x is 84°.
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Additional comment
The measure of y is the supplement of the measure of x, 96°. It is half the measure of the long arc, which is 192°.
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