Find the Measure of the Missing Angle(s) $a=56$ ?
A) $24^{\circ}$ B) $29^{\circ}$

Find the measure of the missing angle(s) .
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$a=56$ ?

A) $24^{\circ}$
B) $29^{\circ}$
C) $34^{\circ}$
D) $44^{\circ}$