tangent-chord angle arc measure
Check the final answer first, then review the worked steps.
Problem
tangent-chord angle arc measure
Step-by-step solution
By the inscribed angle theorem for a tangent-chord angle, the measure of the intercepted arc is twice the measure of the angle: $m\overparen{XY} = 2 \times 73^\circ = 146^\circ$.
Answer
146^\circ