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Pierreten · Answer 1 · 2018-05-19T03:12:55+0000

We know that

is the diameter of circle, so
$\angle ZCW = 180^(\circ)$ . By knowing that central angles have the same degree value as the arcs they form by intercepting the circle, we now know that arc
$ZRW = \angle ZCW = 180^(\circ)$ . So, the arc
$ZWX=ZRW+WX=180^(\circ)+63^(\circ)=243^(\circ)$

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