Find the Measure of the Missing Angle(s) $\mathrm{a}=42$ ?
A) $138^{\circ}$ B) $133^{\circ}$

Multiple Choice

Find the measure of the missing angle(s) .
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$\mathrm{a}=42$ ?

A) $138^{\circ}$
B) $133^{\circ}$
C) $128^{\circ}$
D) $148^{\circ}$